From a mortgage payment to a profit margin to a daily calorie target — every calculation you need to make a sharper decision, free and instant.
Customize any of our 400+ tools to match your brand, or commission a new one tailored to how your business actually calculates — pricing, payroll, quotes, anything. Deployed on your domain, math runs in your visitors' browsers.
Margins, break-even, payroll, VAT, and ROI — for the calls you make daily.
Net profit, gross margin, and markup from revenue and cost.
Units you need to sell before covering fixed and variable costs.
Set selling price from cost using a target markup percentage.
Net pay after tax, deductions, and benefits.
Return on investment for any project, simple or annualized.
Monthly cash in vs. out — runway at a glance.
Quick ratios for liquidity, profitability, and efficiency.
Free inventory analysis calculator. Instant results in your browser.
Mortgage, loan, compound interest, salary, and investment return calculators.
See how savings or debt grows over any period and rate.
Estimate monthly payment, total interest, and amortization schedule.
Estimate monthly payment, total interest, and amortization schedule.
Free canadian mortgage calculator. Instant results in your browser.
Estimate monthly payment, total interest, and amortization schedule.
Estimate monthly payment, total interest, and amortization schedule.
Estimate monthly payment, total interest, and amortization schedule.
Compare your current loan to a new one and see lifetime savings.
Income tax, sales tax, VAT, capital gains, and self-employment estimates.
Estimate income tax owed at federal and state rates.
Estimate the tax due for any common scenario.
Add or remove VAT from any price.
Estimate the tax due for any common scenario.
Estimate the tax due for any common scenario.
Free take-home paycheck calculator. Instant results in your browser.
Estimate the tax due for any common scenario.
Net pay after tax, deductions, and benefits.
401K, IRA, pension, Social Security, and savings-rate planners.
How much you'll have at retirement — and whether it's enough.
How much you'll have at retirement — and whether it's enough.
Project your 401(k) balance at retirement with employer match.
Project IRA growth and compare Roth vs. traditional outcomes.
Project IRA growth and compare Roth vs. traditional outcomes.
Monthly income from a pension or compare lump-sum vs. annuity.
Estimate your monthly Social Security benefit at any claim age.
Payouts and growth for a fixed or variable annuity.
BMI, calorie intake, body fat, due dates, ideal weight, and hydration.
Body mass index from height and weight, with healthy-range context.
Basal metabolic rate — calories burned at rest.
Body fat percentage from common measurement methods.
Body fat percentage from common measurement methods.
Healthy-range weight for your height, age, and frame.
Healthy-range weight for your height, age, and frame.
Free lean body mass calculator. Instant results in your browser.
Free anorexic bmi calculator. Instant results in your browser.
Scientific, percentage, fraction, statistics, geometry, and algebra.
Percentage, change, and error in a single tap.
Percentage, change, and error in a single tap.
Percentage, change, and error in a single tap.
Exponent of any base and value.
Root of any base and value.
Free greatest common factor calculator. Instant results in your browser.
Free least common multiple calculator. Instant results in your browser.
Mean, median, mode, and range from any set of numbers.
Recipe scaling, unit conversions, baking ratios, and cooking times.
Convert between cooking units and ingredient measurements.
Convert between cooking units and ingredient measurements.
Baking conversions — adjust recipes without the math.
Convert between cooking units and ingredient measurements.
Oven temperatures — adjust recipes without the math.
Cups to grams for any quantity, instantly.
Cups to mL for any quantity, instantly.
Cups to ounces for any quantity, instantly.
Concrete, square footage, roofing, flooring, and material estimators.
Concrete needed for any area or project size.
BTU output needed to heat or cool any room size.
Stair estimator with material and waste allowance.
Roofing estimator with material and waste allowance.
Tile estimator with material and waste allowance.
Asphalt needed for any area or project size.
Gravel needed for any area or project size.
Mulch needed for any area or project size.
Life insurance, disability, HSA, and annuity planning.
Free life insurance calculator. Instant results in your browser.
Free comprehensive life insurance analysis calculator. Instant results in your browser.
Free human life value calculator. Instant results in your browser.
Free disability insurance calculator. Instant results in your browser.
Free hsa savings calculator. Instant results in your browser.
Free hsa contribution calculator. Instant results in your browser.
Free hsa goal calculator. Instant results in your browser.
Free hsa vs traditional health plan calculator. Instant results in your browser.
Fuel cost, gas mileage, road trip cost, and vehicle depreciation.
Monthly payment and total cost for any vehicle loan.
Free cash back or low interest calculator. Instant results in your browser.
Free auto lease calculator. Instant results in your browser.
Monthly payment and total cost for any vehicle loan.
Monthly payment and total cost for any vehicle loan.
Compare your current loan to a new one and see lifetime savings.
Monthly payment and total cost for any vehicle loan.
Free buy vs lease calculator. Instant results in your browser.
Length, mass, volume, temperature, area, speed, energy, and data.
Free length calculator. Instant results in your browser.
Free mass calculator. Instant results in your browser.
Volume for any common shape or coordinate pair.
Free temperature calculator. Instant results in your browser.
Area for any common shape or coordinate pair.
Free speed calculator. Instant results in your browser.
Free energy calculator. Instant results in your browser.
Free data storage calculator. Instant results in your browser.
Tip, age, days between dates, GPA, discount, and time-zone tools.
Exact age in years, months, days, and total days.
Exact age in years, months, days, and total days.
Exact age in years, months, days, and total days.
Free birthday calculator. Instant results in your browser.
Days between two dates, or from today to any future date.
Days between two dates, or from today to any future date.
Days between two dates, or from today to any future date.
Days between two dates, or from today to any future date.
Wind chill, heat index, dew point, and humidity calculators.
Wind chill from temperature, humidity, and wind.
Heat index from temperature, humidity, and wind.
Dew point from temperature, humidity, and wind.
Humidity from temperature, humidity, and wind.
Free uv index calculator. Instant results in your browser.
Free apparent temperature calculator. Instant results in your browser.
Free snow load calculator. Instant results in your browser.
Free rainfall to gallons calculator. Instant results in your browser.
Ohm's law, voltage divider, resistor color code, and circuit math.
Voltage drop for any circuit values.
Free resistor (series / parallel) calculator. Instant results in your browser.
Ohm's law for any circuit values.
Free electricity cost calculator. Instant results in your browser.
Voltage divider for any circuit values.
Free resistor color code calculator. Instant results in your browser.
Free led resistor calculator. Instant results in your browser.
Free capacitor (series / parallel) calculator. Instant results in your browser.
IP subnet, Base64, URL encode, password generator, and bandwidth.
IP subnet — quick utility for developers.
Password generator — quick utility for developers.
Bandwidth — quick utility for developers.
Free base64 encoder / decoder calculator. Instant results in your browser.
Free url encoder / decoder calculator. Instant results in your browser.
Free html entity encoder calculator. Instant results in your browser.
Free hash generator (sha) calculator. Instant results in your browser.
Free uuid generator calculator. Instant results in your browser.
Square footage, cubic yards, paint coverage, mulch, and fencing.
Square footage for any room or volume.
Cubic feet for any room or volume.
Cubic yards for any room or volume.
Free cbm (cubic meters) calculator. Instant results in your browser.
Free height calculator. Instant results in your browser.
Free flooring calculator. Instant results in your browser.
Free density calculator. Instant results in your browser.
Free mass calculator. Instant results in your browser.
Dog and cat age, pet food portions, crate size, and aquarium volume.
Free dog age by breed calculator. Instant results in your browser.
Free cat age calculator. Instant results in your browser.
Free dog food portion calculator. Instant results in your browser.
Free cat calorie calculator. Instant results in your browser.
Track pregnancy milestones from your due date.
Free dog crate size calculator. Instant results in your browser.
Free aquarium volume calculator. Instant results in your browser.