Use this tool to convert a period of time in one measurement unit to the equivalent in multiple units including years, months, weeks, days, hours, minutes, seconds, centiseconds (1/100th sec) and milliseconds.

# Time & Frequency Calculators

Online web tools for time, period or frequency measurement conversions and calculations

## Work Done & Power Output to Time Taken Calculator

Use this calculator to determine the elapsed time from the total energy transferred or work done and the power output t=W/P

## Distance to Time Delay Calculator for Electromagnetic Waves in a Vacuum

Calculate the time it takes for an electromagnetic wave to travel in a vacuum by entering the distance to the emission source t=d/c₀

## Photon Energy to Frequency Calculator for Electromagnetic Waves

Calculate the frequency of an electromagnetic wave by entering a value for the corresponding energy per photon for the em wave f=E/h

## Wavelength to Frequency Calculator for Electromagnetic Waves in a Vacuum

Calculate the frequency of an electromagnetic wave in a vacuum by entering a value for the corresponding wavelength f=c₀/λ

## Time Period Converter

This conversion tool will convert a period of time duration from one measurement unit to another and display a conversion table.

## Frequency Converter

This conversion tool will convert a frequency value into different measurement units and display conversion scale related to the converted value.

## Distance and Average Speed to Travel Time Calculator

Estimate travel time using distance to destination and average speed, and display a conversion table for distance vs time with a constant speed, t=d/v

## Period to Frequency Calculator

This tool will convert the period to the equivalent frequency value, by calculating the number of cycles or revolutions per unit period of time from the time it takes to complete one full cycle or revolution, f=1/T, ω=2π/T

## Frequency to Period Calculator

This tool will convert frequency to a period by calculating the time it will take to complete one full cycle or revolution at the specified frequency, T=1/f, T=2π/ω

## Total Mass & Flow Rate to Total Time Calculator

Calculate elapsed time for total mass to flow at a set rate, and show a conversion chart for mass vs flow rate which refreshes when an input is changed, t=m/ṁ

## Total Volume & Flow Rate to Total Time Calculator

Calculate the amount of elapsed time from the flow rate and the total volume transferred, plus display a conversion chart for volume vs elapsed time, t=V/Q

## Land Area & Machine Width & Speed to Coverage Time Calculator

This calculator will estimate the amount of time it will take a machine of a specified width and speed to completely process an area of land, t=A/wv