Finance
Compare four depreciation methods side by side: straight-line, declining balance (with multiplier, e.g. 2 for DDB), sum-of-the-years'-digits (SYD), and units of production (when yearly usage is provided). Shows book-value curves and a year-by-year depreciation table.
depreciation-calculatorMath & Numbers
Convert between ratios and decibels (10·log power, 20·log amplitude), and across absolute units dBm/dBW/dBV/dBu/dBFS/SIL
decibel-calculatorMath & Numbers
Compute observed frequency and frequency shift for a moving source and/or observer
doppler-effect-calculatorMath & Numbers
Compute density, mass, or volume from the other two, with specific gravity and a float/sink check
density-calculatorMath & Numbers
Calculate reaction velocity with Michaelis-Menten, estimate Km/Vmax via Lineweaver-Burk, and model enzyme inhibition.
enzyme-kinetics-calculatorMath & Numbers
Convert degrees to arcminutes with configurable decimal precision
degrees-to-arcminutesMath & Numbers
Convert degrees to arcseconds with configurable decimal precision
degrees-to-arcsecondsMath & Numbers
Convert degrees to gradians with configurable decimal precision
degrees-to-gradiansMath & Numbers
Convert degrees to radians with configurable decimal precision
degrees-to-radiansMath & Numbers
Convert electronvolts to joules with configurable precision
electronvolt-to-jouleMath & Numbers
Convert days to hours with configurable decimal precision
days-to-hoursMath & Numbers
Convert whole days to exact calendar months from a specified start year and month
days-to-months