Finance & health
- VAT calculator (net ↔ gross)Convert a price without tax to a price with tax and back, with the VAT amount.
- Hourly rate to monthly and yearly salaryConvert an hourly wage to daily, weekly, monthly and yearly pay.
- Inflation calculatorWork out the future value (or purchasing power) of a sum at an average yearly inflation rate.
- Rule of 72 (years to double)Estimate how many years it takes for money to double at a given rate.
- Ovulation calculatorEstimate ovulation and the fertile window from the first day of the last period. For information only, not medical advice.
- Weight loss calculator (calorie deficit)Estimate how long it takes to reach a target weight from your daily calorie deficit (about 7,700 kcal per kg).
- Invoice generator (PDF)Create a professional PDF invoice: your details, your client, line items, VAT and total. Nothing is uploaded or stored.
- Loan / mortgage payment calculatorCompute your monthly payment and amortization schedule.
- Compound interest calculatorProject your savings growth with regular contributions.
- VAT / sales tax calculatorAdd or remove VAT, or compute a markup/discount.
- BMI calculatorBody Mass Index and category.
- Daily calorie needs (TDEE) calculatorEstimate your total daily energy expenditure by activity level.
- Tip calculatorWork out the tip and each person's share of a bill.
- Discount calculatorPrice after a discount and the amount saved.
- Profit margin calculatorMargin, markup and profit from a cost and a selling price.
- ROI calculatorReturn on investment, total and annualized.
- Savings goal calculatorHow much to save each month to reach a target amount in a given time.
- Simple interest calculatorInterest and final value of a simple-interest investment.
- Hourly, monthly, yearly salary converterConvert a salary between hourly, monthly and yearly amounts.
- Trip fuel cost calculatorEstimate the fuel used and the cost of a car trip.
- BMR calculatorCalories burned at rest, using the Mifflin-St Jeor formula.
- Ideal weight calculatorIdeal weight from the Lorentz and Devine formulas, with the healthy BMI range.
- Body fat calculatorEstimate body fat percentage with the US Navy method (measurements).
- Daily water intake calculatorEstimate how much water to drink per day from weight and activity.
- Pregnancy due date calculatorCompute the expected due date from the last period (Naegele's rule).
- Sleep cycle calculatorBest bedtimes to wake up at the end of a cycle (90-minute cycles).
- Running pace calculatorPace per kilometer and speed from a distance and a time.
- Heart rate zone calculatorMaximum heart rate and training zones by age.