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272 tools
Design your optimal J-pole antenna for a chosen frequency using our smart J-pole antenna calculator.
Determine the fluid flow rate using the differential pressure calculator.
Use this Knudsen number calculator to calculate the Knudsen number which helps you determine which mechanics formulation should be used.
Our Hagen-Poiseuille's law calculator is a simple way to calculate the flow rate, resistance, or pressure change of a fluid or gas in a pipe.
Use our refrigerant capillary tube calculator to adjust your cooling device's current capillary tube system when changing tube size.
This simple lightning distance calculator can estimate how far away a storm is based on the time difference between a flash of lightning and the thunder ⚡⚡⚡
Use our virtual temperature calculator to find the density temperature using either known temperatures or the mixing ratio!
Use this mixed air calculator to determine the properties of the mixed air stream without using a psychrometric chart.
The mixed air temperature calculator gives you the total temperature of two gases with different temperatures and concentrations.
This Compton scattering calculator helps you find the wavelength extension of the photon scattered by any particle.
Measure the width of your hair using a laser and physics. This hair diffraction calculator will help you set up the experiment, understand the physics behind (hair) diffraction patterns, and, of course, calculate the width of your hair.
Learn how to calculate the daylight hours of (almost) any place on Earth with Omni Calculator!
P-raise the sun: with our sunrise calculator, you will learn how to find the time of sunrise — to the minute!
We let you estimate the rolling resistance of any vehicle with the rolling resistance calculator, to make sure you are running as efficiently as possible!
Find how to design the perfect road (and much more) with our angle of banking calculator
The pounds per square inch calculator enables you to easily compute pressure in psi or your preferred unit.
With our laser linewidth and bandwidth calculator, you will learn how much your laser pointer deviates from an ideal monochromaticity.
This tool allows you to calculate the optical density from the incident light intensity and transmitted light intensity.
Our speed of light calculator can help you to calculate the distance light can travel in a fixed time.
This modulation calculator helps find the amplitude modulation index using the amplitude of the modulation signal and the carrier signal. You can also calculate the frequency modulation index.
Use the gold weight calculator to determine the amount of precious metal you need and its cost for DIY projects.
Omni's intrinsic carrier concentration calculator allows you to work out the carrier concentration in intrinsic semiconductors.
Use this number density calculator to compute the charge carrier number density of specific conductors.
Determine the element stiffness matrix for a truss, beam, or frame element using our stiffness matrix calculator.