Number Calculators · 220 microapps
220 calculators.
None of them want your email.
BMI, mortgage, percentage, p-value, sales tax, factorial — every calculator you'd Google. They open in a second, do one thing, and never make you "sign up to see the answer." Pick one below.
Most popular
The 12 calculators people open every day
Calculadora de Porcentagem
Calcule porcentagens, descontos e mais
Calculadora de Gorjeta
Calcule gorjetas e divida contas
Calculadora de IMC
Calcule seu Índice de Massa Corporal
Calculadora de Empréstimo
Calcule parcelas mensais e juros totais
common.toolList.mortgage-calculator.label
common.toolList.mortgage-calculator.desc
Calculadora de Desconto
Encontre o preço com desconto
Compound Interest Calculator
Calculate compound interest over time
common.toolList.average-calculator.label
common.toolList.average-calculator.desc
common.toolList.sales-tax-calculator.label
common.toolList.sales-tax-calculator.desc
Calculadora de GPA
Calcule sua Média de Notas
common.toolList.standard-deviation-calculator.label
common.toolList.standard-deviation-calculator.desc
Salary to Hourly
Convert annual salary to hourly rate
Money & finance
Mortgages, taxes, retirement, debt — the calculators that move money.
common.toolList.mortgage-calculator.label
common.toolList.mortgage-calculator.desc
Calculadora de Empréstimo
Calcule parcelas mensais e juros totais
Calculadora de Gorjeta
Calcule gorjetas e divida contas
common.toolList.car-loan-calculator.label
common.toolList.car-loan-calculator.desc
common.toolList.credit-card-payoff-calculator.label
common.toolList.credit-card-payoff-calculator.desc
common.toolList.debt-snowball-calculator.label
common.toolList.debt-snowball-calculator.desc
common.toolList.house-affordability-calculator.label
common.toolList.house-affordability-calculator.desc
Compound Interest Calculator
Calculate compound interest over time
common.toolList.tax-bracket-calculator.label
common.toolList.tax-bracket-calculator.desc
common.toolList.sales-tax-calculator.label
common.toolList.sales-tax-calculator.desc
Calculadora de Desconto
Encontre o preço com desconto
common.toolList.emergency-fund-calculator.label
common.toolList.emergency-fund-calculator.desc
common.toolList.savings-goal-calculator.label
common.toolList.savings-goal-calculator.desc
common.toolList.net-worth-calculator.label
common.toolList.net-worth-calculator.desc
common.toolList.inflation-calculator.label
common.toolList.inflation-calculator.desc
common.toolList.401k-calculator.label
common.toolList.401k-calculator.desc
common.toolList.roth-ira-calculator.label
common.toolList.roth-ira-calculator.desc
common.toolList.hsa-contribution-calculator.label
common.toolList.hsa-contribution-calculator.desc
common.toolList.millionaire-calculator.label
common.toolList.millionaire-calculator.desc
common.toolList.roi-calculator.label
common.toolList.roi-calculator.desc
common.toolList.budget-planner-50-30-20.label
common.toolList.budget-planner-50-30-20.desc
common.toolList.break-even-calculator.label
common.toolList.break-even-calculator.desc
common.toolList.freelance-rate-calculator.label
common.toolList.freelance-rate-calculator.desc
common.toolList.life-insurance-needs-calculator.label
common.toolList.life-insurance-needs-calculator.desc
common.toolList.business-insurance-cost-estimator.label
common.toolList.business-insurance-cost-estimator.desc
common.toolList.annual-income-calculator.label
common.toolList.annual-income-calculator.desc
Salary to Hourly
Convert annual salary to hourly rate
Math & statistics
Algebra, stats, formulas. The math you'd use after school.
Calculadora de Porcentagem
Calcule porcentagens, descontos e mais
common.toolList.percent-difference.label
common.toolList.percent-difference.desc
common.toolList.average-calculator.label
common.toolList.average-calculator.desc
common.toolList.standard-deviation-calculator.label
common.toolList.standard-deviation-calculator.desc
Geometric Mean Calculator
Calculate the geometric mean of numbers
common.toolList.p-value-calculator.label
common.toolList.p-value-calculator.desc
common.toolList.factorial-calculator.label
common.toolList.factorial-calculator.desc
common.toolList.combination-calculator.label
common.toolList.combination-calculator.desc
common.toolList.permutation-calculator.label
common.toolList.permutation-calculator.desc
common.toolList.log-calculator.label
common.toolList.log-calculator.desc
common.toolList.long-division-calculator.label
common.toolList.long-division-calculator.desc
common.toolList.quadratic-formula-calculator.label
common.toolList.quadratic-formula-calculator.desc
common.toolList.prime-number-checker.label
common.toolList.prime-number-checker.desc
common.toolList.fraction-calculator.label
common.toolList.fraction-calculator.desc
common.toolList.fraction-simplifier.label
common.toolList.fraction-simplifier.desc
common.toolList.square-root-calculator.label
common.toolList.square-root-calculator.desc
common.toolList.scientific-notation-converter.label
common.toolList.scientific-notation-converter.desc
Gerador de Números Aleatórios
Gere números aleatórios em qualquer faixa
Histogram Maker
Create histograms from your data
common.toolList.distance-formula.label
common.toolList.distance-formula.desc
Calculadora de GPA
Calcule sua Média de Notas
Calculadora de Notas
Nota do curso, prova final e tabela de notas — tudo em um
Geometry & shapes
Area, volume, surface, slope — the shapes you remember from school.
common.toolList.rectangle-area-calculator.label
common.toolList.rectangle-area-calculator.desc
common.toolList.area-of-a-triangle.label
common.toolList.area-of-a-triangle.desc
common.toolList.circumference-of-a-circle.label
common.toolList.circumference-of-a-circle.desc
common.toolList.diameter-of-a-circle.label
common.toolList.diameter-of-a-circle.desc
common.toolList.pythagorean-theorem.label
common.toolList.pythagorean-theorem.desc
common.toolList.volume-calculator.label
common.toolList.volume-calculator.desc
common.toolList.volume-of-a-cube.label
common.toolList.volume-of-a-cube.desc
common.toolList.volume-of-a-cylinder.label
common.toolList.volume-of-a-cylinder.desc
common.toolList.volume-of-a-sphere.label
common.toolList.volume-of-a-sphere.desc
common.toolList.volume-of-a-cone.label
common.toolList.volume-of-a-cone.desc
common.toolList.volume-of-a-triangular-prism.label
common.toolList.volume-of-a-triangular-prism.desc
common.toolList.surface-area-calculator.label
common.toolList.surface-area-calculator.desc
common.toolList.slope-calculator.label
common.toolList.slope-calculator.desc
common.toolList.degrees-to-radians.label
common.toolList.degrees-to-radians.desc
common.toolList.square-footage-calculator.label
common.toolList.square-footage-calculator.desc
Health & fitness
BMI, calories, macros, hormones. Body math.
Calculadora de IMC
Calcule seu Índice de Massa Corporal
Calculadora de Calorias
Estime suas necessidades calóricas diárias
Calculadora de TDEE
Encontre seu gasto energético diário total
common.toolList.macro-calculator.label
common.toolList.macro-calculator.desc
common.toolList.water-intake-calculator.label
common.toolList.water-intake-calculator.desc
common.toolList.one-rep-max-calculator.label
common.toolList.one-rep-max-calculator.desc
Army Body Fat Calculator
Calculate body fat using Army method
common.toolList.height-predictor.label
common.toolList.height-predictor.desc
common.toolList.period-calculator.label
common.toolList.period-calculator.desc
common.toolList.ovulation-calculator.label
common.toolList.ovulation-calculator.desc
common.toolList.due-date-calculator.label
common.toolList.due-date-calculator.desc
common.toolList.dog-age-calculator.label
common.toolList.dog-age-calculator.desc
Unit converters
Imperial to metric, kitchen to lab, here to there.
Conversor de Unidades
Converta entre quaisquer unidades de medida
Length Converter
Convert between length and distance units
Weight Converter
Convert between weight units
Temperature Converter
Convert between Celsius, Fahrenheit & Kelvin
Mass Calculator
Calculate mass from density and volume
common.toolList.feet-to-cm.label
common.toolList.feet-to-cm.desc
common.toolList.feet-to-inches.label
common.toolList.feet-to-inches.desc
common.toolList.inches-to-feet.label
common.toolList.inches-to-feet.desc
common.toolList.mm-to-inches.label
common.toolList.mm-to-inches.desc
common.toolList.grams-to-ounces.label
common.toolList.grams-to-ounces.desc
common.toolList.grams-to-moles.label
common.toolList.grams-to-moles.desc
common.toolList.oz-to-cups.label
common.toolList.oz-to-cups.desc
common.toolList.oz-to-lbs.label
common.toolList.oz-to-lbs.desc
common.toolList.ml-to-oz-converter.label
common.toolList.ml-to-oz-converter.desc
common.toolList.mg-to-ml-converter.label
common.toolList.mg-to-ml-converter.desc
common.toolList.tablespoon-to-grams-converter.label
common.toolList.tablespoon-to-grams-converter.desc
common.toolList.nm-to-ft-lbs.label
common.toolList.nm-to-ft-lbs.desc
common.toolList.speed-distance-time-calculator.label
common.toolList.speed-distance-time-calculator.desc
Binary to Decimal
Convert binary, decimal, hex & octal
Roman Numeral Converter
Convert between numbers and Roman numerals
Number to Words
Convert numbers to written words
Around the house
Building, landscaping, fueling — the math of a Saturday project.
Why we built 220
Calculator software is the most over-built category on the internet.
You've seen it. You Google "loan calculator," click the first result, and it's a 4 MB page with a cookie banner, a newsletter pop-up, three banner ads, a "Pro version" upsell, and somewhere underneath all that — eventually — a calculator. By the time the page renders, you've forgotten why you came.
Calculator.net is the gold standard of this. They have every calculator. They also have every dark pattern. We don't beat them on the math — the math is identical. We beat them on what we left out.
220 microapps. One job each. Each calculator is a single page that loads in under a second, does the calculation, and gets out of the way. No newsletter modal. No "Pro" tier. No pop-up at the eight-second mark begging for your email. The math is the same. The page respects you.
Speed
Loads in under a second
No client-side framework warming up. No third-party scripts. The calculator is on screen before competing pages finish loading their cookie banner.
Privacy
Your numbers stay yours
Every calculation runs in your browser. Your salary, weight, debt — none of it leaves your machine. Sign-up is optional and only saves favorites.
Honest
No "Pro" upsell
There is no Pro tier. Members get clean pages and AI tools at near-cost. The calculators are free for everyone — that's a fact, not a slogan.
Other shelves
Microapp has six more shelves. Walk down them.