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86 calculators and converters, free and without an account. Start typing above, or pick one below.
Unit Conversion21
- Unit ConverterAll-in-one unit conversion tool for any measurement category.
- Inches to Centimeters ConverterConvert inches to centimeters instantly.
- Centimeters to Inches ConverterConvert centimeters to inches instantly.
- Miles to Kilometers ConverterConvert miles to kilometers instantly.
- Kilometers to Miles ConverterConvert kilometers to miles instantly.
- Kilograms to Pounds ConverterConvert kilograms to pounds instantly.
- Pounds to Kilograms ConverterConvert pounds to kilograms instantly.
- Fahrenheit to Celsius ConverterConvert degrees Fahrenheit to degrees Celsius instantly.
- Celsius to Fahrenheit ConverterConvert degrees Celsius to degrees Fahrenheit instantly.
- Length ConverterConvert any length or distance unit instantly with formulas and examples.
- Weight ConverterConvert weight and mass units in any direction, with common conversion tables.
- Temperature ConverterConvert °F, °C, and Kelvin instantly with formulas and reference points.
- Feet to Meters ConverterConvert feet to meters instantly.
- Meters to Feet ConverterConvert meters to feet instantly.
- Ounces to Grams ConverterConvert ounces to grams instantly.
- Grams to Ounces ConverterConvert grams to ounces instantly.
- Cups to Milliliters ConverterConvert US cups to milliliters instantly.
- Milliliters to Cups ConverterConvert milliliters to US cups instantly.
- Gallons to Liters ConverterConvert US gallons to liters instantly.
- Liters to Gallons ConverterConvert liters to US gallons instantly.
- Volume ConverterConvert liquid and dry volume units instantly with a full quick-reference table.
Finance29
- Mortgage CalculatorEstimate your monthly mortgage payment including PITI and PMI.
- Loan CalculatorCalculate monthly payments and total cost for any loan.
- Compound Interest CalculatorSee the power of compound interest on any investment over time.
- House Affordability CalculatorEstimate how much home you can afford based on income and DTI.
- Retirement CalculatorProject retirement savings and monthly income estimate.
- 401(k) CalculatorProject 401(k) balance with employer match and contribution breakdown.
- Paycheck CalculatorEstimate net pay after federal tax, FICA, and deductions.
- Income Tax CalculatorEstimate federal income tax, taxable income, and marginal bracket.
- Auto Loan CalculatorEstimate your monthly car payment before you buy.
- Credit Card Payoff CalculatorSee how long to pay off your credit card debt.
- Savings CalculatorSee how your savings grow with regular contributions and compound interest.
- Salary to Hourly CalculatorConvert annual salary to hourly rate and vice versa.
- Inflation CalculatorSee how inflation erodes purchasing power over time.
- APY CalculatorConvert APR to APY for any compounding frequency.
- CD CalculatorCalculate CD returns and interest earned by maturity.
- Hourly to Salary CalculatorConvert hourly pay to annual salary and all pay periods.
- Roth IRA CalculatorProject Roth IRA balance and tax-free retirement income.
- Refinance CalculatorCalculate refinance savings and break-even time.
- Student Loan CalculatorCalculate student loan payments and total interest.
- 1099 Tax CalculatorEstimate 2026 federal, self-employment, state reserve, and quarterly taxes on 1099 profit.
- Rent Increase CalculatorCompare current and proposed rent in dollars, percent, annual cost, and income share.
- Freelance Hourly Rate CalculatorTurn income, costs, time off, and billable capacity into an hourly rate.
- PTO Payout CalculatorEstimate gross and take-home PTO payout from a confirmed balance and policy.
- Shift Differential CalculatorEstimate shift premium, blended regular rate, overtime premium, and gross pay.
- Car Affordability CalculatorEstimate how much car you can afford before you shop.
- Car Payment CalculatorCalculate your true monthly car payment including tax and fees.
- Emergency Fund CalculatorFind your emergency fund target and track progress.
- Extra Mortgage Payment CalculatorCalculate interest saved by making extra mortgage payments.
- Debt Payoff CalculatorFind your debt-free date and total interest cost.
Health9
- BMI Calculator for AdultsCalculate your BMI and see your adult weight category.
- Calorie CalculatorFind your daily calorie target for maintenance, weight loss, or gain.
- Macro CalculatorGet daily protein, carb, and fat targets from your calorie goal.
- BMR CalculatorCalculate calories burned at rest using BMR formulas.
- TDEE CalculatorFind your daily calorie needs based on activity level.
- Body Fat CalculatorEstimate body fat % with the US Navy method.
- Protein CalculatorCalculate daily protein needs by weight and activity.
- Ideal Weight CalculatorEstimate ideal weight using 4 clinical formulas.
- Waist-to-Height Ratio CalculatorCalculate WHtR and assess abdominal fat risk.
Everyday Tools5
- Tip CalculatorCalculate tip, total, and per-person split with rounding and pre-tax options.
- Percentage CalculatorFind percent of a number, percent change, and percentage difference.
- Discount CalculatorFind sale price, savings, and discount percentage.
- Sales Tax CalculatorAdd or remove sales tax from any price.
- Schengen 90/180 CalculatorTrack Schengen days, audit the rolling 90/180 limit, and plan a possible re-entry date.
Time & Date4
- Age CalculatorFind your exact age in years, months, days, and total days old.
- Date Difference CalculatorFind days, weeks, and months between any two dates.
- Business Days CalculatorCount working days between any two dates.
- Date Add/Subtract CalculatorAdd or subtract days, weeks, months, or years from any date.
Cooking3
Construction8
- Concrete CalculatorCalculate cubic yards and bag count for any concrete project.
- Square Footage CalculatorCalculate area in sq ft, sq yd, m², and acres for any shape.
- Paint CalculatorEstimate paint gallons for walls and ceilings with cost and rounding.
- Flooring CalculatorCalculate flooring sq ft, boxes needed, and material cost for any project.
- Tile CalculatorCalculate tile count for any room or area.
- Drywall CalculatorCalculate drywall sheets needed for any room.
- Mulch CalculatorCalculate cubic yards of mulch for any garden bed.
- Gravel CalculatorCalculate cubic yards and tons of gravel needed.
Automotive1
Business3
Technology & Engineering3
- 3D Printing Cost CalculatorTurn print inputs, risk, fees, and margin into delivered cost and selling price.
- AI Token CalculatorEstimate text tokens, context usage, and cost with transparent custom assumptions.
- LLM API Cost CalculatorCompare token-based LLM API costs across current provider presets or custom rates.