What's new
A dated record of what we have added, fixed and improved, newest first.
Faster pages and a tidier catalogue
- Pages now load far less JavaScript: each calculator’s explanations and FAQs load with that calculator instead of with every page, and scripts are now served compressed.
- Category pages and the full calculator list now show released calculators only. New calculators are released in batches.
- Fewer ad placements on calculator pages, and none on navigation pages such as the home page and category lists.
- Rewritten About, Contact and Privacy pages, and this changelog.
Speed and references
- Each calculator now loads as its own small file instead of one large bundle.
- “Also known as” names on calculator pages, so you can recognise a tool by the name you know it by.
- Health calculators (BMI, BMR, daily calories, ideal weight, water intake) now cite their sources — WHO, NHLBI, EFSA, USDA and peer-reviewed research.
Step-by-step walkthroughs
- Most calculators now show an animated step-by-step derivation using your own inputs, ending in exactly the result shown at the top.
- Calculators where a step list would mislead (iterative solvers, lookup tables, tax-bracket chains) deliberately have none.
Redesigned calculator pages
- The calculator now comes first on every page, ahead of the explanations.
- A compact result bar follows you on mobile when the main result scrolls out of view.
Country tools, citations and a public API
- Finland and Bulgaria salary calculators, a lev-to-euro converter at the fixed rate of 1.95583, and a VAT calculator with 2026 rates for 30 countries.
- Shareable links that keep your inputs, and ready-made citations (APA, Chicago, IEEE, BibTeX) on every calculator.
- A free public API for common calculations, documented on the developers page.
New calculators and multilingual search
- Hundreds of new calculators across mathematics, science, statistics, dates and everyday life, each tagged Beginner, Intermediate or Advanced.
- Net-salary calculators for Sweden, Finland, Denmark and Norway, a term-deposit calculator, and a business-days-from-date calculator.
- Search now understands everyday names for calculators in all 29 languages.
A chart on every calculator
- Every calculator now includes a visualisation of its result.
- Four equation-finder calculators (for example, a parabola through three points).
- “How this is calculated” explanations translated into all 29 languages; mobile layout fixes.
Explanations and comparisons
- “How this is calculated” explanations covering inputs, method, assumptions and edge cases.
- What-If comparisons on finance calculators, and a full legal disclaimer.
23 new calculators
- New tools for pregnancy, fitness, finance, home projects, unit conversion and dates.
29 languages
- The site and its calculators became available in 29 languages, including all official EU languages, Russian, Ukrainian and Chinese (Simplified and Traditional).