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Percent Calculator
Quick percent math: X% of Y, increase/decrease, reverse percent.
Discount Calculator
Compute final price after discount, required discount to reach a target price, and original price before discount.
Days Between Dates Calculator
Calculate the difference between two dates in years, months, weeks, days, hours, minutes, and seconds. Optional 'include end date'.
All Tools
Percent Calculator
Quick percent math: X% of Y, increase/decrease, reverse percent.
Discount Calculator
Compute final price after discount, required discount to reach a target price, and original price before discount.
Days Between Dates Calculator
Calculate the difference between two dates in years, months, weeks, days, hours, minutes, and seconds. Optional 'include end date'.
Height Comparison
Compare two heights: difference, ratio, and a simple visual in cm/m or ft/in.
MTG Deck Probability Calculator
Calculate the probability of drawing specific cards from your Magic: The Gathering deck. Considers deck size, number of target cards, and hand size.
Satoshi ↔ BTC Converter
Convert Satoshis to BTC (and back) with exact precision. No rounding errors. Fast, accessible, and private.
Gwei ↔ ETH ↔ Wei Converter
Convert Gwei to ETH and Wei (and back) with exact precision. No rounding errors. Fast, accessible, and private.
Random Number Generator
Quickly generate random numbers within a specified range. Set minimum, maximum, and count of numbers.
What's My IP & Location
See your public IP address and IP-based location. Uses ipinfo.io to determine country, region, and city.
Password Generator
Generate secure passwords with customizable parameters. Choose length, character types, and complexity level.
About KitsDB
Our comprehensive collection of online calculators and converters helps you solve everyday problems quickly and efficiently. From financial planning to unit conversions, we've got you covered.
All tools are completely free to use, require no registration, and work seamlessly across all devices. Built with privacy in mind - your data never leaves your browser.