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Fast, focused tools for running, everyday maths, time, conversions, text and secure random generation.
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Featured running toolkit
Calculate pace, compare race outcomes and build a usable training or split plan.
Calculate pace, finish time, speed and full kilometre or mile splits.
Turn a one-mile target into exact pace, speed and split guidance.
Turn a 5K goal into exact pacing and a usable race split plan.
Plan an even or negative-split 10K and download the chart.
Build a complete 10-mile pacing plan with even or negative splits.
Calculate 15K pace, finish time, speed and kilometre or mile splits.
Popular tools
A balanced selection from running, maths, conversion, time, security and text tools.
Calculate pace, finish time, speed and full kilometre or mile splits.
Convert a recent race result into equivalent 5K, 10K, half and marathon times.
Calculate percentages, ratios and percentage change.
Add or remove VAT and see net, tax and gross amounts instantly.
Convert common length, weight, temperature and volume units.
Compare dates and times across major world time zones.
Calculate exact age in years, months, days and total days.
Create a live browser countdown to any date and time.
Generate cryptographically random passwords with custom rules.
Create memorable multi-word passphrases in your browser.
Count words, characters, sentences and reading time as you type.
Pick one or more random numbers from a range.
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