Online Calculators
Free calculators for percentages, dates, working hours, proportions, and other everyday calculations.
Available tools
Business Days Calculator
Count business days between dates with configurable weekends and manual holidays.
Work Hours Calculator
Calculate daily or weekly hours, breaks, overnight shifts, and time above a threshold.
Percentage Calculator
Calculate percentages, increases, decreases, and percentage change with a clear explanation.
Rule of Three Calculator
Solve direct and inverse proportions and see the calculation step by step.
Age Calculator
Calculate exact age in years, months, and days, plus the next birthday.
Days Between Dates Calculator
Calculate days, weeks, and calendar difference between two dates with optional inclusive counting.
Unit Price Calculator
Calculate and compare prices per kilogram, liter, meter, or item across different package sizes.
Showing 1–7 of 7 tools
Quick calculations for everyday situations
This category brings together general tools for percentages, proportions, unit-price comparisons, dates, and ages. Each calculator explains the required inputs and presents results with useful context.
Date calculators distinguish calendar days from business days, while the work-hours calculator accounts for shifts and breaks. Review the selected options because endpoint inclusion, custom weekends, or break times can change the result.
How to interpret the results
Results depend on the entered values and the assumptions shown by each tool. They are useful for checks and estimates, but do not replace official records or rules specific to a company, contract, or jurisdiction.