Calculators

Percentage calculators, date differences, age calendars, and BMI sheets.

Percentage Calculator

Calculate percentage increases, decreases, or absolute portion sizes. Formats: "20% of 150" or "value1, value2".

Percentage Change Calculator

Calculate percentage increase or decrease. Format: old,new

Percentage Difference Calculator

Calculate percentage difference between two numbers. Format: a,b

Fraction to Decimal Calculator

Convert fractions to decimals. Format: a/b

Age Calculator

Calculate exact age from birthdate. Format: YYYY-MM-DD

Date Difference Calculator

Days between two dates. Format: YYYY-MM-DD, YYYY-MM-DD

Unix Epoch to Date

Convert Unix timestamp to human-readable date.

BMI Calculator

Calculate Body Mass Index. Format: weight(kg), height(cm) OR weight(lb), height(in)

Margin Calculator

Calculate profit margin. Format: Cost, Revenue

Discount Calculator

Calculate price after discount. Format: Original Price, Discount %

Sales Tax Calculator

Calculate total with tax. Format: Price, Tax %

Tip Calculator

Calculate tip and total. Format: Bill Amount, Tip %

CPM Calculator

Calculate Cost Per Mille. Format: Total Cost, Total Impressions

CTR Calculator

Calculate Click-Through Rate. Format: Clicks, Impressions

🔒 Client-Side Confidentiality

All operations inside Calculators take place locally using web sandboxes. No payloads, raw inputs, or compiled results are transmitted to our servers or recorded. Your data remains yours.

Explore Developer API