All calculators
Twenty-two focused calculators, each with the formula, a worked example and answers to the questions people actually ask.
Showing 22 of 22 calculators
Percentage Calculator
Percentages, increases, discounts and margins in six modes.
Open calculatorPaycheck Calculator
Turn an hourly rate or salary into weekly, monthly and annual pay.
Open calculatorLoan Payment Calculator
Monthly payment, total interest and a full amortization schedule.
Open calculatorAge Calculator
Exact age in years, months, days — plus your next birthday.
Open calculatorDate Calculator
Add or subtract dates, count days between, or count business days.
Open calculatorTip Calculator
Split a bill and tip fairly in a couple of taps.
Open calculatorRent Affordability Calculator
How much rent your income comfortably supports.
Open calculatorSavings Goal Calculator
The monthly amount that reaches your goal on time.
Open calculatorProfit Calculator
Net profit, margin, ROI and break-even for real product costs.
Open calculatorPrice Markup Calculator
Convert between cost, markup, margin and selling price.
Open calculatorBMI Calculator
Body mass index and weight category from height and weight.
Open calculatorCalorie Calculator
Daily maintenance calories and BMR using the Mifflin-St Jeor equation.
Open calculatorWater Intake Calculator
Recommended daily water based on weight, activity and climate.
Open calculatorPaint Calculator
Gallons of paint and cost for a room or project.
Open calculatorSquare Footage Calculator
Total area in square feet and square meters for one or more rooms.
Open calculatorCompound Interest Calculator
Future value of savings or investments with recurring contributions.
Open calculatorHourly Rate Calculator
Minimum rate to charge to hit your income goal after expenses and time off.
Open calculatorBreak-Even Calculator
Units and revenue needed to cover fixed and variable costs.
Open calculatorROI Calculator
Total and annualized return on investment.
Open calculatorFuel Cost Calculator
Trip fuel cost from distance, MPG or L/100km and fuel price.
Open calculatorUnit Conversion Calculator
Convert length, weight, volume and temperature units.
Open calculatorGPA Calculator
Weighted grade point average from credits and letter grades.
Open calculator