Calculate percentages, percentage changes, and proportions.
Tool category
Calculators
Accurate everyday calculators and unit converters with clear assumptions.
Popular calculators
Convert common length, weight, temperature, data, and speed units.
Estimate monthly payment, total payment, and loan interest.
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Calculate percentages, percentage changes, and proportions.
Calculate a sale price and savings from a percentage discount.
Calculate a tip and total, including an optional group split.
Calculate age in completed years, months, and days.
Find the exact duration between two calendar dates.
Find elapsed hours and minutes between two times.
Convert common length, weight, temperature, data, and speed units.
Convert metric, imperial, and nautical length units.
Convert kilograms, grams, pounds, and ounces.
Convert Celsius, Fahrenheit, and Kelvin accurately.
Convert decimal and binary data storage units.
Convert common metric, imperial, and nautical speed units.
Estimate monthly payment, total payment, and loan interest.
Calculate growth with configurable compounding and contributions.
Calculate simple interest and final amount.
Add or extract a configurable percentage of tax.
Calculate profit, margin, and markup from cost and revenue.
Estimate trip fuel use, total cost, and cost per traveler.
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