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Small calculations. Better decisions.
Choose a calculator, enter your numbers, and get an immediate result with the formula explained.
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Business & Freelancing
Pricing, profitability, cash-flow and work calculators for freelancers and small businesses.
Marketing & E-commerce
Measure advertising efficiency, customer acquisition, conversions and online sales.
Finance & Investment
Plan loans, savings, budgets, debt, returns and everyday financial decisions.
Mathematics & Time
Solve percentages, averages, ratios, dates, durations and everyday calculations.
Unit Converters
Convert common metric, imperial, digital, speed, volume and currency values.
Home & Travel
Estimate household projects, energy use and travel costs.
Health & Lifestyle
General health and lifestyle estimates with clear formulas and appropriate cautions.
Calendars & Planning
Create printable calendars and plan employee leave without an account.
All tools
Calendar Generator
Create a calendar by country and region, add your own events, and print or save it as a PDF.
Calendars & PlanningEmployee Leave Planner
Plan employee vacation, sick leave and other absences in one private yearly calendar.
Calendars & PlanningProfit Margin
See profit, margin, and markup together before you set a price.
Business & FreelancingHourly Rate
Find a sustainable hourly rate from your income goal and available billable time.
Business & FreelancingProject Price
Turn hours, expenses, risk, and target margin into a defensible quote.
Business & FreelancingBreak-Even
Calculate the sales volume needed to cover fixed and variable costs.
Business & FreelancingMeeting Cost
Reveal the cost of one meeting and the monthly impact of recurring meetings.
Business & FreelancingROI
Measure net gain, total ROI, and an annualized comparison rate.
Finance & InvestmentMarkup
Turn cost and markup into a selling price, profit, and equivalent margin.
Business & FreelancingPercentage Change
Calculate the percentage increase or decrease between two values.
Mathematics & TimeDiscount
Find the sale price and savings from an original price and discount percentage.
Finance & InvestmentLoan Payment
Estimate monthly payments, total repayment, and total interest for a fixed-rate loan.
Finance & InvestmentCompound Interest
Project future value from a starting amount, rate, time, and monthly contributions.
Finance & InvestmentSalary to Hourly
Convert annual salary into monthly, weekly, and hourly gross pay.
Business & FreelancingROAS
Measure revenue returned for every unit of advertising spend.
Marketing & E-commercePercentage
Find a percentage of any number in one step.
Mathematics & TimePercentage Difference
Compare two values without treating either one as the starting value.
Mathematics & TimeVAT
Add or remove VAT using any rate you choose.
Business & FreelancingSimple Interest
Calculate interest that does not compound over time.
Finance & InvestmentSavings Goal
Estimate the monthly amount needed to reach a savings target.
Finance & InvestmentMortgage Payment
Estimate monthly principal and interest for a fixed-rate mortgage.
Finance & InvestmentCredit Card Payoff
Estimate how long a balance takes to repay with a fixed monthly payment.
Finance & InvestmentInflation
Estimate how inflation changes prices and purchasing power.
Finance & InvestmentCAGR
Calculate the annualized growth rate between a starting and ending value.
Finance & InvestmentAverage
Find the arithmetic mean of up to four values.
Mathematics & TimeWeighted Average
Combine values that have different weights or importance.
Mathematics & TimeRatio
Simplify the relationship between two whole numbers.
Mathematics & TimeTip
Calculate a tip and the final bill total.
Mathematics & TimeSplit Bill
Divide a bill and optional tip equally between people.
Mathematics & TimeUnit Price
Compare product value by calculating the price per unit.
Mathematics & TimeFuel Cost
Estimate the fuel required and cost of a journey.
Home & TravelFuel Economy
Convert between L/100 km and miles per gallon.
Unit ConvertersBMI
Calculate body mass index from height and weight.
Health & LifestyleBasal Metabolic Rate
Estimate calories your body uses at rest each day.
Health & LifestyleDaily Calories
Estimate daily calorie needs from BMR and activity level.
Health & LifestyleBody Fat Estimate
Estimate body fat percentage using BMI, age and sex factor.
Health & LifestyleLength
Convert metres into kilometres, feet, inches and miles.
Unit ConvertersWeight
Convert kilograms into grams, pounds and ounces.
Unit ConvertersTemperature
Convert Celsius into Fahrenheit and Kelvin.
Unit ConvertersArea
Convert square metres into square feet, acres and hectares.
Unit ConvertersDebt Payoff
Estimate how long a debt takes to repay and how much interest it costs.
Finance & InvestmentAge
Calculate age in completed years, months and days.
Mathematics & TimeDate Difference
Find the exact number of days and weeks between two dates.
Mathematics & TimeWorking Days
Count weekdays between two dates while excluding Saturdays and Sundays.
Mathematics & TimeTime Duration
Calculate elapsed hours and minutes between two times.
Mathematics & TimeCurrency
Convert an amount using the exchange rate you enter.
Unit ConvertersVolume
Convert litres to millilitres, cubic metres and US or UK gallons.
Unit ConvertersSpeed
Convert kilometres per hour to mph, metres per second and knots.
Unit ConvertersElectricity Cost
Estimate the cost of running an appliance from power, time and energy price.
Home & TravelPaint
Estimate litres of paint needed from surface area, coverage and coats.
Home & TravelCalorie Deficit
Estimate daily calorie deficit and an approximate weekly weight-change equivalent.
Health & LifestyleCustomer Acquisition Cost
Calculate marketing and sales cost per new customer.
Marketing & E-commerceConversion Rate
Calculate the percentage of visitors who complete a desired action.
Marketing & E-commerceLoan Amortization
Estimate a fixed monthly payment and its first interest and principal portions.
Finance & Investment50/30/20 Budget
Split monthly income into needs, wants and savings using a simple guideline.
Finance & InvestmentGross Profit
Calculate gross profit and gross margin from revenue and cost of goods sold.
Business & FreelancingNet Profit
Calculate net profit and net margin after total expenses.
Business & FreelancingOperating Margin
Measure operating income as a percentage of revenue.
Business & FreelancingCash Runway
Estimate how many months available cash can cover the current net burn.
Business & FreelancingBurn Rate
Calculate average monthly cash consumption over a period.
Business & FreelancingRevenue Growth
Calculate the percentage increase or decrease in revenue.
Business & FreelancingSales Commission
Calculate commission and earnings from sales and a commission rate.
Business & FreelancingCost per Click
Calculate advertising cost per click.
Marketing & E-commerceCost per 1,000 Impressions
Calculate advertising cost per thousand impressions.
Marketing & E-commerceCost per Acquisition
Calculate advertising cost per conversion or acquisition.
Marketing & E-commerceClick-Through Rate
Calculate clicks as a percentage of impressions.
Marketing & E-commerceAverage Order Value
Calculate average revenue generated per order.
Marketing & E-commerceEmergency Fund
Estimate an emergency savings target from essential monthly expenses.
Finance & InvestmentDigital Storage
Convert gigabytes to megabytes, terabytes and binary gibibytes.
Unit ConvertersWater Intake
Estimate a general daily fluid target from body weight and activity.
Health & Lifestylemi → km
Convert mi to km instantly with a clear formula and reverse check.
Unit Converterskm → mi
Convert km to mi instantly with a clear formula and reverse check.
Unit Converterscm → in
Convert cm to in instantly with a clear formula and reverse check.
Unit Convertersin → cm
Convert in to cm instantly with a clear formula and reverse check.
Unit Convertersmm → in
Convert mm to in instantly with a clear formula and reverse check.
Unit Convertersin → mm
Convert in to mm instantly with a clear formula and reverse check.
Unit Convertersm → ft
Convert m to ft instantly with a clear formula and reverse check.
Unit Convertersft → m
Convert ft to m instantly with a clear formula and reverse check.
Unit Convertersft → in
Convert ft to in instantly with a clear formula and reverse check.
Unit Convertersin → ft
Convert in to ft instantly with a clear formula and reverse check.
Unit Convertersm → yd
Convert m to yd instantly with a clear formula and reverse check.
Unit Convertersyd → m
Convert yd to m instantly with a clear formula and reverse check.
Unit Converterskm → m
Convert km to m instantly with a clear formula and reverse check.
Unit Convertersm → km
Convert m to km instantly with a clear formula and reverse check.
Unit Converterskg → lb
Convert kg to lb instantly with a clear formula and reverse check.
Unit Converterslb → kg
Convert lb to kg instantly with a clear formula and reverse check.
Unit Convertersg → oz
Convert g to oz instantly with a clear formula and reverse check.
Unit Convertersoz → g
Convert oz to g instantly with a clear formula and reverse check.
Unit Converterskg → st
Convert kg to st instantly with a clear formula and reverse check.
Unit Convertersst → kg
Convert st to kg instantly with a clear formula and reverse check.
Unit Convertersmg → g
Convert mg to g instantly with a clear formula and reverse check.
Unit Convertersg → mg
Convert g to mg instantly with a clear formula and reverse check.
Unit ConvertersL → US gal
Convert L to US gal instantly with a clear formula and reverse check.
Unit ConvertersUS gal → L
Convert US gal to L instantly with a clear formula and reverse check.
Unit ConvertersL → UK gal
Convert L to UK gal instantly with a clear formula and reverse check.
Unit ConvertersUK gal → L
Convert UK gal to L instantly with a clear formula and reverse check.
Unit Convertersml → US fl oz
Convert ml to US fl oz instantly with a clear formula and reverse check.
Unit ConvertersUS fl oz → ml
Convert US fl oz to ml instantly with a clear formula and reverse check.
Unit ConvertersL → ml
Convert L to ml instantly with a clear formula and reverse check.
Unit Convertersml → L
Convert ml to L instantly with a clear formula and reverse check.
Unit Convertersm³ → L
Convert m³ to L instantly with a clear formula and reverse check.
Unit ConvertersL → m³
Convert L to m³ instantly with a clear formula and reverse check.
Unit Converters°C → °F
Convert °C to °F instantly with a clear formula and reverse check.
Unit Converters°F → °C
Convert °F to °C instantly with a clear formula and reverse check.
Unit Converters°C → K
Convert °C to K instantly with a clear formula and reverse check.
Unit ConvertersK → °C
Convert K to °C instantly with a clear formula and reverse check.
Unit Converterskm/h → mph
Convert km/h to mph instantly with a clear formula and reverse check.
Unit Convertersmph → km/h
Convert mph to km/h instantly with a clear formula and reverse check.
Unit Converterskn → km/h
Convert kn to km/h instantly with a clear formula and reverse check.
Unit Converterskm/h → kn
Convert km/h to kn instantly with a clear formula and reverse check.
Unit Convertersm² → ft²
Convert m² to ft² instantly with a clear formula and reverse check.
Unit Convertersft² → m²
Convert ft² to m² instantly with a clear formula and reverse check.
Unit Convertersha → ac
Convert ha to ac instantly with a clear formula and reverse check.
Unit Convertersac → ha
Convert ac to ha instantly with a clear formula and reverse check.
Unit Convertersbar → psi
Convert bar to psi instantly with a clear formula and reverse check.
Unit Converterspsi → bar
Convert psi to bar instantly with a clear formula and reverse check.
Unit ConverterskPa → psi
Convert kPa to psi instantly with a clear formula and reverse check.
Unit Converterspsi → kPa
Convert psi to kPa instantly with a clear formula and reverse check.
Unit ConverterskW → hp
Convert kW to hp instantly with a clear formula and reverse check.
Unit Convertershp → kW
Convert hp to kW instantly with a clear formula and reverse check.
Unit ConvertersJ → cal
Convert J to cal instantly with a clear formula and reverse check.
Unit Converterscal → J
Convert cal to J instantly with a clear formula and reverse check.
Unit ConverterskWh → J
Convert kWh to J instantly with a clear formula and reverse check.
Unit ConvertersJ → kWh
Convert J to kWh instantly with a clear formula and reverse check.
Unit Convertersh → min
Convert h to min instantly with a clear formula and reverse check.
Unit Convertersmin → h
Convert min to h instantly with a clear formula and reverse check.
Unit Convertersmin → s
Convert min to s instantly with a clear formula and reverse check.
Unit Converterss → min
Convert s to min instantly with a clear formula and reverse check.
Unit Convertersdays → h
Convert days to h instantly with a clear formula and reverse check.
Unit Convertersh → days
Convert h to days instantly with a clear formula and reverse check.
Unit ConvertersMB → GB
Convert MB to GB instantly with a clear formula and reverse check.
Unit ConvertersGB → MB
Convert GB to MB instantly with a clear formula and reverse check.
Unit ConvertersGB → TB
Convert GB to TB instantly with a clear formula and reverse check.
Unit ConvertersTB → GB
Convert TB to GB instantly with a clear formula and reverse check.
Unit ConvertersMb/s → MB/s
Convert Mb/s to MB/s instantly with a clear formula and reverse check.
Unit ConvertersMB/s → Mb/s
Convert MB/s to Mb/s instantly with a clear formula and reverse check.
Unit Converters° → rad
Convert ° to rad instantly with a clear formula and reverse check.
Unit Convertersrad → °
Convert rad to ° instantly with a clear formula and reverse check.
Unit ConvertersEUR → USD
Convert EUR to USD instantly with a clear formula and reverse check.
Unit ConvertersUSD → EUR
Convert USD to EUR instantly with a clear formula and reverse check.
Unit Converters