Tools
Calculators
Solve everyday calculations with our collection of free online calculators. From finance and health to math and unit conversions, get fast and accurate results instantly.
21 Tools
Calculators tools
- New
Water Intake Calculator
Estimate daily water intake from body weight activity and climate.
Open Tool - New
CSS Clamp Calculator
Calculate clamp() min preferred and max values for fluid type and spacing.
Open Tool - New
Password Entropy Calculator
Score password entropy in bits from charset size and length.
Open Tool - New
JSON Size Calculator
Measure pasted JSON payload size in bytes KB and estimated gzip size.
Open Tool - New
Subscription Price Calculator
Compare monthly versus annual subscription pricing and effective discounts.
Open Tool - New
Freelancer Hourly Rate Calculator
Work out a sustainable freelance hourly rate from salary taxes and billable hours.
Open Tool - New
YouTube Shorts Revenue Calculator
Estimate YouTube Shorts earnings from views RPM and creator revenue share.
Open Tool - New
Prompt Token Estimator
Count approximate tokens in a pasted prompt before you send it to an LLM.
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Gemini Cost Calculator
Estimate Google Gemini API cost from prompt and output tokens.
Open Tool - New
Claude Cost Calculator
Estimate Anthropic Claude API cost from input and output tokens.
Open Tool - New
OpenAI API Cost Calculator
Calculate OpenAI API spend from input and output tokens using a static price table.
Open Tool - New
AI Token Calculator
Estimate prompt and completion token counts for common AI model context windows.
Open Tool Length Converter
Convert meters, feet, inches, and miles in your browser.
Open ToolPercentage Calculator
Calculate percentages, increases, and decreases.
Open ToolAge Calculator
Calculate exact age from birth date.
Open ToolBMI Calculator
Calculate body mass index from height and weight.
Open ToolEMI Calculator
Calculate loan EMI and interest breakdown.
Open ToolGPA Calculator
Calculate grade point average from scores.
Open ToolDiscount Calculator
Find sale price after percentage discounts.
Open ToolTip Calculator
Split bills and calculate tips quickly.
Open ToolUnit Converter
Convert length, weight, and volume units.
Open Tool
