Calculators

Free everyday calculators for percentages, dates, money, and planning.

Age Calculator

Calculate age from a birth date to today.

Calculate matching image or video dimensions while preserving aspect ratio.

Estimate body mass index from weight and height.

Count characters, words, lines, and non-space characters in text.

Estimate future value using principal, annual rate, term, and compounding frequency.

Calculate the number of days between two dates.

Calculate final price and savings from a percentage discount.

Estimate a fixed monthly loan payment.

Estimate running or walking pace from distance and elapsed time.

Estimate brute-force search space from password length and character-set size.

Calculate percentages, increases, decreases, and percentage differences.

Calculate the percentage increase or decrease between two values.

Calculate gross profit, margin, and markup from cost and selling price.

Generate secure random integers within a selected range.

Estimate reading time, speaking time, word count, and character count for pasted text.

Estimate sales tax and total from a price and tax rate.

Calculate simplified aspect ratio from width and height.

Split a bill and optional tip across multiple people.

Remove extra spaces, blank lines, and formatting clutter.

Calculate tip amount and total bill.

Remove repeated spaces, trim lines, and reduce excessive blank lines.