Calculate anything. Instantly.
100+ free online calculators for money, health, fitness, home, and everyday life. No sign-up, no fluff — just fast, accurate answers.
No signup. No paywalls. Just fast, accurate calculators for finance, health, and everyday life.
Whether you need a mortgage calculator to plan your next home purchase, a percentage calculator for a quick maths check, or a compound interest calculator to project long-term savings growth — SnapCalc has you covered. All tools are free, browser-based, and return results instantly without requiring a login. We cover every major category: personal finance, health and fitness, real estate, business, travel, food, and more.
104 tools available
Percentage
Solve percentage problems quickly with this percentage calculator for percent of a number, what percent one value is of another, and percentage increase or decrease.
Open Toolarrow_forwardMortgage
Calculate your monthly mortgage payment, total interest, and amortization. Free and instant.
Open Toolarrow_forwardTip & Bill Splitter
Calculate the tip amount, total bill, and split it evenly between any number of people.
Open Toolarrow_forwardCredit Card Payoff
Find out how long it will take to pay off your credit card and how much interest you will pay.
Open Toolarrow_forwardLoan Payoff & Extra Payment
See how much time and interest you save by making extra payments on your loan.
Open Toolarrow_forwardCompound Interest & Savings Growth
Calculate how your savings or investment grows over time with compound interest and regular contributions.
Open Toolarrow_forwardRent vs. Buy
Compare the true cost of renting vs. buying a home over time, including equity, opportunity cost, and hidden costs.
Open Toolarrow_forwardNet Worth
Calculate your net worth by adding up your assets and subtracting your liabilities.
Open Toolarrow_forwardTax Bracket (AU & US)
Calculate your income tax, effective tax rate, and take-home pay for Australia or the United States.
Open Toolarrow_forwardSuperannuation & Retirement Savings
Calculate your projected superannuation balance at retirement based on your current balance, salary, and contributions.
Open Toolarrow_forwardCalorie & Macros (TDEE)
Calculate your Total Daily Energy Expenditure (TDEE), ideal calorie intake, and macronutrient targets for your goal.
Open Toolarrow_forwardBody Fat Percentage Estimator
Estimate your body fat percentage using the US Navy method based on height, neck, waist, and hip measurements.
Open Toolarrow_forwardPregnancy Due Date
Calculate your estimated due date, current week of pregnancy, and key milestone dates.
Open Toolarrow_forwardDaily Water Intake
Calculate how much water you should drink per day based on your weight, activity level, and climate.
Open Toolarrow_forwardRunning Pace & Race Time Predictor
Calculate your running pace, finish time, or required distance. Predict race times for 5K, 10K, half marathon, and marathon.
Open Toolarrow_forwardSleep Cycle & Bedtime
Calculate the best bedtime or wake-up time based on 90-minute sleep cycles to wake up feeling refreshed.
Open Toolarrow_forwardStamp Duty (Australia)
Calculate Australian stamp duty or transfer duty by state and territory, including basic first home buyer concession scenarios and total purchase cost impact.
Open Toolarrow_forwardRefinance Savings
Estimate how much refinancing to a lower home loan rate could save each month, how long it takes to recover the costs, and the total saving over the loan.
Open Toolarrow_forwardPaint Coverage
Estimate how many litres of paint you may need for walls and ceilings, including coats, windows, doors, and a waste allowance.
Open Toolarrow_forwardFence & Flooring Material Estimator
Estimate how many boards, palings, tiles, deck boards, or panels you may need for fencing and flooring projects, including a waste allowance.
Open Toolarrow_forwardFreelance Rate
Work out a sustainable freelance hourly or project rate by accounting for income goals, non-billable time, tax, overhead, and the realities of self-employed work.
Open Toolarrow_forwardInvoice Total with GST
Calculate invoice totals with GST added or removed, and estimate GST on multiple line items for Australian business invoicing.
Open Toolarrow_forwardBreak-Even Point
Calculate the number of units or amount of revenue needed to cover costs and break even, with optional profit targets for simple business planning.
Open Toolarrow_forwardROI
Use this ROI calculator to compare return on investment, annualised performance, and payback period before you commit money to a project, asset, or business expense.
Open Toolarrow_forwardProfit Margin
Calculate gross margin, markup, net margin, selling price targets, and maximum allowable cost for simple business pricing decisions.
Open Toolarrow_forwardUnit Converter
Convert between common length, weight, temperature, volume, area, and speed units instantly with a simple metric to imperial and imperial to metric converter.
Open Toolarrow_forwardFuel Cost & Road Trip
Estimate the fuel cost of a trip, litres required, cost per person, and cost per 100km for driving and road trip planning.
Open Toolarrow_forwardDiscount & Sale Price
Calculate sale price, percentage savings, and original price so you can check retail discounts and compare whether a deal is actually worth taking.
Open Toolarrow_forwardCurrency Converter
Convert between major world currencies using indicative exchange rates and compare approximate values for travel, shopping, transfers, and budgeting.
Open Toolarrow_forwardDate Difference & Countdown
Calculate the number of days between dates, count down to a future event, or add and subtract days from any starting date.
Open Toolarrow_forwardPool Volume & Chemical
Calculate pool volume in litres and estimate chlorine, stabiliser, or pH chemical dosing so you can manage water balance more confidently.
Open Toolarrow_forwardSolar Panel Savings Estimator
Estimate payback period, bill reduction, and long-term value with this solar savings calculator for household solar panel decisions.
Open Toolarrow_forwardCoffee & Caffeine
Estimate daily caffeine intake, compare it with general safety guidance, and see roughly how much caffeine may still be in your system over time.
Open Toolarrow_forwardConcrete & Mulch Volume
Estimate cubic metres of concrete, mulch, soil, gravel, sand, or crushed rock needed for a project, including a simple wastage allowance.
Open Toolarrow_forwardSavings Goal
Calculate how much you need to save per week or month to reach your savings goal by a target date.
Open Toolarrow_forwardEmergency Fund
Calculate your ideal emergency fund size and how long your current savings would last if you lost your income.
Open Toolarrow_forwardDebt Snowball vs. Avalanche
Compare the debt snowball and debt avalanche payoff methods to see which saves you more money and time.
Open Toolarrow_forwardChild Education Cost
Project the future cost of your child's university education with inflation, and how much to save each month to cover it.
Open Toolarrow_forwardEstate & Inheritance
Estimate the value of an estate and understand Australian inheritance rules — there is no inheritance tax in Australia, but capital gains and superannuation rules apply.
Open Toolarrow_forwardOvertime Pay
Calculate regular pay, overtime pay, and total earnings from hourly rate, hours worked, and overtime multiplier across one or more weeks.
Open Toolarrow_forwardLoan Comparison
Compare two loans side by side by repayment, interest, fees, and total cost so you can judge which option is actually cheaper overall.
Open Toolarrow_forwardElectricity Cost
Estimate your power bill with this electricity cost calculator by converting appliance usage, energy rates, and usage patterns into daily, monthly, and annual electricity costs.
Open Toolarrow_forwardCar Loan Repayment
Estimate repayments, interest cost, and total loan expense with this car loan repayment calculator for new or used vehicle financing.
Open Toolarrow_forwardSubscription & Streaming Cost Splitter
Split shared subscription costs fairly between friends, housemates, or family members and see the monthly and yearly amount each person should pay.
Open Toolarrow_forwardPet Food Cost
Estimate weekly, monthly, and yearly feeding costs with this pet food cost calculator for dogs, cats, and multi-pet households.
Open Toolarrow_forwardScreen Time & Productivity
Estimate how daily screen habits translate into lost time, recovered focus, and productivity trade-offs with this screen time and productivity calculator.
Open Toolarrow_forwardWedding Budget
Plan a realistic celebration with this wedding budget calculator that estimates total cost, per-guest spend, and where your biggest wedding expenses are likely to land.
Open Toolarrow_forwardDividend Income
Estimate dividend income from shares or funds with this dividend income calculator for annual cash flow, yield comparisons, and income planning.
Open Toolarrow_forwardCarbon Footprint
Estimate your annual carbon footprint from transport, flights, diet, and household electricity with a personal carbon footprint calculator built for everyday decisions.
Open Toolarrow_forwardRaise & Promotion
Estimate the real impact of a pay rise with this raise calculator for annual salary, monthly pay, percentage increase, and comparison scenarios.
Open Toolarrow_forwardCommute Cost
Estimate the real cost of getting to work with this commute cost calculator for fuel, fares, parking, time, and annual commuting expense.
Open Toolarrow_forwardSick Day Cost
Estimate the financial impact of employee absence with this sick day cost calculator for wages, productivity loss, and business planning.
Open Toolarrow_forwardRemote Work Savings
Estimate how much money working from home can save with this remote work savings calculator for commuting, meals, clothing, and time-related trade-offs.
Open Toolarrow_forwardContractor vs. Employee
Compare total cost and take-home trade-offs with this contractor vs employee calculator for hiring decisions and work arrangement planning.
Open Toolarrow_forwardIntermittent Fasting
Plan fasting and eating windows with this intermittent fasting calculator for 16:8, 18:6, OMAD, and other fasting schedules.
Open Toolarrow_forwardAlcohol Unit & Standard Drinks
Estimate alcohol units and standard drinks from drink type, size, and strength with this alcohol calculator for smarter planning and safer consumption awareness.
Open Toolarrow_forwardUV Index & Sun Exposure
Estimate safer sun exposure windows with this UV index calculator by combining UV level, skin sensitivity, and time outdoors.
Open Toolarrow_forwardDaily Water Intake
Estimate a practical daily hydration target with this water intake calculator based on body size, climate, and activity level.
Open Toolarrow_forwardPostpartum Recovery Timeline
Get a week-by-week postpartum recovery milestone guide based on your birth type and recovery progress.
Open Toolarrow_forwardNBN Plan Value
Compare NBN and home internet plans by cost, speed, data allowance, and yearly value so you can judge which plan better fits your household.
Open Toolarrow_forwardGrocery Budget
Estimate a weekly and yearly grocery budget based on household size, diet, shopping style, and eating-out habits in Australia.
Open Toolarrow_forwardHome Renovation ROI
Estimate whether a renovation is likely to add enough property value to justify the spend with this home renovation ROI calculator for value uplift, profit, and payback thinking.
Open Toolarrow_forwardMoving Cost Estimator
Estimate the cost of moving house, including removalists, packing help, supplies, storage, and access surcharges for Australian moves.
Open Toolarrow_forwardLifetime Earnings
Project total career earnings over decades with this lifetime earnings calculator for salary growth, career planning, and long-term income comparisons.
Open Toolarrow_forwardChild Height Predictor
Estimate likely adult height with this child height predictor using current growth information and parent-height context as a rough planning guide.
Open Toolarrow_forwardSchool Zone Property Premium
Estimate the property price premium for being in a top school catchment zone in Australia.
Open Toolarrow_forwardChildcare Cost (CCS)
Calculate your weekly childcare cost after the Child Care Subsidy (CCS) based on your income and hours of care.
Open Toolarrow_forwardBack to School Budget
Estimate the cost of sending your child back to school including uniforms, stationery, devices, and fees.
Open Toolarrow_forwardPocket Money & Kids Savings
Calculate age-appropriate pocket money amounts, chore values, and project how much your child can save.
Open Toolarrow_forwardFlight Carbon Offset
Estimate the carbon impact of flying and the likely cost to offset it with this flight carbon offset calculator for domestic and international travel.
Open Toolarrow_forwardHoliday Budget Planner
Plan a more realistic trip budget with this holiday budget planner for accommodation, transport, food, activities, and daily travel spending.
Open Toolarrow_forwardFrequent Flyer Points
Estimate points earned from flights, spending, or promotions with this frequent flyer points calculator for reward planning and loyalty comparisons.
Open Toolarrow_forwardTravel Insurance Cost Estimator
Estimate travel insurance cost and compare likely premium drivers with this travel insurance cost estimator for domestic and international trips.
Open Toolarrow_forwardJet Lag Recovery
Estimate how many days it will take to recover from jet lag based on time zones crossed and direction of travel.
Open Toolarrow_forwardRecipe Scaling
Resize ingredients accurately with this recipe scaling calculator for doubling, halving, and adjusting recipes to any serving size.
Open Toolarrow_forwardCoffee Cost
Compare the cost of buying café coffee vs. making it at home — and see your yearly savings.
Open Toolarrow_forwardMeal Prep Cost
Calculate the cost per meal for your meal prep batch — ingredients, servings, and weekly savings vs. eating out.
Open Toolarrow_forwardWine & Drinks
Calculate how many bottles of wine, beer, or spirits you need for a party based on guests and event length.
Open Toolarrow_forwardBaking Substitution
Find the right substitute for any baking ingredient with correct quantities — butter, eggs, sugar, flour and more.
Open Toolarrow_forward1 Rep Max
Estimate your one-rep max from submax lifts with this 1 rep max calculator for strength training, programming, and safer progress tracking.
Open Toolarrow_forwardSwim Pace
Work out pace per 100 metres, projected finish times, and training targets with this swim pace calculator for pool and open-water swimmers.
Open Toolarrow_forwardCycling Power-to-Weight Ratio
Estimate watts per kilogram with this cycling power-to-weight ratio calculator for climbing performance, training benchmarks, and race goals.
Open Toolarrow_forwardMarathon Negative Split
Plan a smarter race strategy with this marathon negative split calculator for first-half pace, second-half pace, and finish-time targeting.
Open Toolarrow_forwardWhat's My Time Worth
Calculate the monetary value of any task based on your hourly rate — decide what to DIY, delegate, or outsource.
Open Toolarrow_forwardRentvesting
Compare the cost of renting where you want to live while owning an investment property elsewhere, and estimate the long-term numbers behind a rentvesting strategy in Australia.
Open Toolarrow_forwardNegative Gearing
Calculate the annual tax impact of a negatively geared investment property in Australia, including your property loss, tax saving, and after-tax cash outflow.
Open Toolarrow_forwardBody Corporate Fee
Calculate the annual cost of body corporate or strata levies on an Australian investment property and see how those fees affect rental yield and net income.
Open Toolarrow_forwardProperty Depreciation
Estimate annual investment property depreciation deductions in Australia, including Division 40 and Division 43 allowances and the likely tax benefit at your marginal rate.
Open Toolarrow_forwardFirst Home Buyer Grant
Estimate first home buyer grants and stamp duty concessions by Australian state or territory so you can see the possible upfront benefit before buying.
Open Toolarrow_forwardCloud Storage Cost
Compare the real yearly cost of iCloud, Google One, Dropbox, and OneDrive so you can choose the best cloud storage plan for your budget and device setup.
Open Toolarrow_forwardSubscription Audit
Use this subscription audit calculator to track monthly app, streaming, gym, and software subscriptions so you can see your true yearly cost and cut wasted spending.
Open Toolarrow_forwardPhone Upgrade Cost
Calculate the true cost of upgrading your phone versus keeping your current device, including plan differences, trade-in value, and repair costs.
Open Toolarrow_forwardGaming PC vs Console Cost
Compare the total cost of gaming on PC versus console over several years, including hardware, games, subscriptions, peripherals, and likely upgrade costs.
Open Toolarrow_forwardData Usage
Estimate how much mobile data you use each month based on video streaming, social media, music, browsing, email, and video call habits.
Open Toolarrow_forwardHome Battery Storage ROI
Calculate home battery payback, annual savings, and 10-year return on investment for Australian households comparing storage systems such as Powerwall-style batteries.
Open Toolarrow_forwardEV vs. Petrol Running Cost
Compare electric vehicle and petrol car running costs over several years, including fuel or charging, servicing, registration, depreciation, and total ownership cost.
Open Toolarrow_forwardRainwater Tank Savings
Estimate annual water bill savings, usable rain capture, and payback period for a rainwater tank based on roof area, rainfall zone, and household use in Australia.
Open Toolarrow_forwardHome Insulation Payback
Estimate energy bill savings, heating and cooling cost reduction, and insulation payback period for Australian homes upgrading roof, wall, or under-floor insulation.
Open Toolarrow_forwardRedundancy Payout
Calculate estimated redundancy pay, notice pay, leave entitlements, and total payout under Australian NES rules to help you understand what a redundancy package may include.
Open Toolarrow_forwardAnnual Leave Payout
Calculate the value of unused annual leave on resignation, redundancy, dismissal, or contract end in Australia, including possible leave loading.
Open Toolarrow_forwardPenalty Rates
Calculate weekend, public holiday, and overtime penalty pay under common Australian awards so you can estimate your hourly rate and total shift pay more confidently.
Open Toolarrow_forwardSmall Claims Court Limit Checker
Check small claims court or tribunal limits, filing fees, and basic eligibility across Australian states and territories before starting a claim.
Open Toolarrow_forwardLatte Factor
See how much a recurring daily habit could cost over time and what that same money might grow to if regularly invested instead.
Open Toolarrow_forwardHedonic Adaptation
Estimate how long a purchase may continue to feel satisfying, how financial stress affects enjoyment, and what that spending works out to per day of happiness.
Open Toolarrow_forwardCalculators for every area of life
Our calculator library spans a dozen categories so you can find the right tool fast — whether you're budgeting for a wedding, planning a fitness goal, or comparing loan offers.
Finance & Money
From mortgage repayments and compound interest to debt snowball planning and tax brackets — our finance calculators help you make smarter money decisions.
Health & Fitness
Track calories, estimate body fat, plan your running pace, or calculate sleep cycles. Our health calculators put evidence-based numbers at your fingertips.
Home & Real Estate
Buying, renovating, or renting? Calculate stamp duty, compare rent vs buy, estimate paint coverage, and work out refinance savings before you commit.
Business & Freelance
Set the right freelance rate, calculate break-even points, work out profit margins, and generate GST-ready invoice estimates — all in seconds.
Why use SnapCalc?
Instant, accurate results
Every calculator runs entirely in your browser. There's no server round-trip, so results appear the moment you finish typing. All formulas are based on standard financial, scientific, and health guidelines.
Private by design
Your numbers never leave your device. We don't log inputs, require an account, or sell your data. What you calculate stays with you.
Mobile-friendly
Every tool is fully responsive. Whether you're on a phone checking a tip at a restaurant or on a desktop comparing mortgage scenarios, the experience is the same — fast and clear.
Frequently asked questions
- Are all calculators completely free?
- Yes. Every calculator on SnapCalc is 100% free with no sign-up, no account, and no hidden paywalls. Just enter your numbers and get instant results.
- How accurate are the calculations?
- Our calculators use standard financial and scientific formulas. Results are intended for informational and planning purposes. For major financial decisions, always confirm figures with a qualified professional.
- Do you store my data?
- No. All calculations happen entirely in your browser. We never store, log, or transmit your input values.
- Can I use these calculators on mobile?
- Absolutely. Every calculator is fully responsive and optimised for phones and tablets, so you can calculate on the go.