PTPercentage calculator
Calculate percentages and discounts.
Open tool ↗Calculators online
Free online tools for calculators. Choose a task and review the options and limitations before using the result.
Proportion calculator
Find a missing value using a proportion.
Open tool ↗Currency converter
Convert amounts using reference exchange rates.
Open tool ↗Unit converter
Convert measurements between units.
Open tool ↗Days between dates
Calculate the difference between dates.
Open tool ↗Age calculator
Calculate age from a date of birth.
Open tool ↗Work hours calculator
Calculate hours worked and breaks.
Open tool ↗Compound interest
Estimate growth using compound interest.
Open tool ↗Grade average
Calculate the average of your grades.
Open tool ↗Split bill and tip
Divide a bill between people.
Open tool ↗Fuel cost
Estimate the cost of a journey.
Open tool ↗Compare unit prices
Compare prices per unit.
Open tool ↗Profit and margin
Calculate profit and margin.
Open tool ↗Price before discount
Calculate the price before a discount.
Open tool ↗Energy consumption
Estimate energy use and cost.
Open tool ↗Area and perimeter
Calculate rectangle and circle measurements.
Open tool ↗Fraction to decimal
Convert a fraction to a decimal number.
Open tool ↗Average speed
Calculate average speed from distance and time.
Open tool ↗Download time
Estimate how long a download takes.
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