Online tools
Výpočtář
English calculators and converters from Výpočtář. Free tools for finance, health, units, and everyday estimates.
Popular calculators
Most used calculations for finance, home, and school.
VAT Calculator
Convert prices with and without Czech VAT at 21% and 12%. Useful for invoices, e-commerce, and quick checks.
Currency Converter
Convert CZK, EUR, USD and more using Czech National Bank daily rates. Free conversion with no sign-up.
Unit Converter
Convert metres, kilograms, litres, °C/°F and more in one place. Handy for school, work, and DIY.
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Browse calculators by topic.
Finance and banking
Mortgages, loans, savings, investments, interest and other financial calculations for planning. Start with a mortgage or savings tool, then follow related calculators.
19 tools
Money, wages and taxes
VAT, wages, discounts, margins and tax conversions with source notes where applicable. Indicative models for quick checks, not accounting software.
9 tools
Mathematics
Percentages, equations, fractions, combinatorics and other math calculations for school and work. From basic percents to equations in one place.
23 tools
Geometry
Perimeters, areas and volumes of plane and solid shapes using standard formulas.
19 tools
Science and physics
Speed, force, energy, electrical calculations and other physics relationships.
16 tools
Converters
Unit and currency conversions including CNB exchange rates where available.
2 tools
Date and time
Age, date differences, business days, countdowns and other time calculations.
8 tools
Home and construction
Paint, tiles, concrete, appliance energy and other home and construction calculations.
9 tools
Cars and transport
Fuel consumption, trip cost, driving range and cost per kilometer. Quick estimates before a trip or commute.
6 tools
Health and fitness
Estimated BMI, BMR, TDEE and running pace. Not a medical diagnosis.
4 tools
School and statistics
Means, deviations, probability and other statistical calculations for school.
7 tools
New calculators
Recently added or significantly updated tools.