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Calculators for primers, reaction setup and molecular quantities

Solar-system ephemeris calculations with documented time spans

Instrument-specific observing calculations

Depth-of-field and hyperfocal calculations

Cloud-service cost estimates with inspectable assumptions

Room-mode calculations for rectangular and shaped rooms

Generate PDF and Word documents from office-editor templates

Generate documents from Office templates and multiple data sources

Steam, condensate, water and air-system calculations

Food comparisons, recipe nutrition and a connected diary

Computational algebra and number-theory software

High-precision numerical expressions with custom functions

Nutrient and water calculations for planted aquariums

Pressure-loss calculations with pipe and fitting data

Arithmetic, finance and practical calculation worksheets

Topic-based calculators for practical questions

Formula calculators with selectable input units

Mathematics and practical calculators by subject

High-precision scientific calculation with reusable expressions

Arbitrary-precision arithmetic that keeps track of units

Arithmetic, finance and programming modes in one app

Subject calculators and a custom calculator builder

A searchable catalogue of calculations and conversions

Programmable scientific arithmetic with saved formulas