All Free Tools and Calculators

Improve your AI prompts: strip filler, save tokens, and add role, format and constraints with a large role library.

Work out percentages, increase, decrease and the difference between two numbers instantly, with a chart.

Create strong random passwords or passphrases in your browser, with a strength meter and crack-time estimate.

Calculate return on ad spend, ROI, cost per acquisition and your break-even ROAS, with a chart.

Calculate return on investment, net profit and the annualised return for any project.

Build correctly tagged UTM campaign URLs to track traffic sources in Google Analytics.

Count characters, words, sentences and reading time live, with social and ad platform limits tracked.

Fix scrambled numbers, punctuation and Latin words in Arabic ad copy before pasting into Meta, Google or TikTok Ads.

Add VAT to an amount or extract it from a VAT-inclusive price at any rate, with a full breakdown.

Find the sale price and your saving, and work out stacked discounts correctly.

Calculate your exact age in years, months and days, plus days lived and time to your next birthday.

Count working days between two dates, excluding weekends and public holidays.

Compute your body mass index and see your health category.

Coming soon

Convert length, weight, temperature, area and volume units instantly.

All tools