Useful answers,
without an account.
Practical calculators that run in your browser, with clear assumptions and useful explanations.
Financial planning
Explore savings growth or understand the full monthly cost of owning a home.
Explore financial planningMeasurement conversions
Read mixed units, check rounding, or convert a spreadsheet column without losing its rows.
Explore length and weight conversionsText and writing
Count words, visible characters or UTF-8 bytes. Choose the text sections that belong in a submission, check a limit, and understand why another counter may differ.
Count text and read the counting guidesSolid geometry
Find a solid’s volume, surface area or missing dimension. See the shape assumptions, check units, and combine non-overlapping parts.
Explore solid geometry and its guidesScientific calculations
Evaluate and edit numerical expressions, choose degrees or radians, and recall calculations with their original settings.
Open the scientific calculator and its guidesGerman salary and deductions
Estimate German take-home pay, compare a salary change, and see monthly and annual tax and social-insurance deductions.
Calculate German take-home pay and compare salariesDesigned for everyday questions
No signup. Clear inputs, understandable results, and calculations that stay on your device.