Construction
Stairs, concrete and roofing, checked against building code limits.
- Stair Stringer CalculatorCalculate rise, run, stringer length and tread count from your total floor height. Checks results against building code limits.
- Concrete Slab CalculatorWork out how many cubic yards or metres of concrete a slab needs, plus bag counts and a waste allowance.
- Roof Pitch CalculatorConvert roof pitch between rise-per-12, degrees and percent, then get rafter length and the true roof surface area.
Other categories
- Image toolsConvert, resize and compress images without uploading them anywhere.
- File & dataMerge PDFs, reshape data files and encode text — all processed locally.
- Text toolsCount, clean and transform text for writing, editing and publishing.
- Developer toolsHashes, identifiers and encoding — the small utilities you reach for daily.
- FinanceLoan payments, interest and percentages, with the full schedule shown.
- EverydayUnits, percentages and conversions that come up constantly.