All tools › Wiring and waves
Frequency and wavelength
Either half of the pair, the photon's energy, and which part of the spectrum it is
It runs entirely in this browser tab: the numbers you type are never uploaded, and the tool makes no network request while it works. Open your browser's network panel and try it — nothing leaves the page.
Settings
- Refractive index
- One for vacuum, about 1.33 for water and 1.5 for glass. The frequency is what does not change at a boundary.
How to use it
- Paste your text into the box above, or open a file.
- Adjust the settings beside it until the result is what you wanted.
- Copy the result, or save it as a file. The result updates as you type.
Questions
- Can I build from this?
- Not from this alone. The cable, beam and rainwater tools each say so on their own result: they are arithmetic, and what may be built is decided by the wiring, structural and water regulations where the work is — none of which this page has read.
- Why does a tool refuse a number it could clearly calculate?
- Because several of these formulas are fits rather than laws. Wind chill is defined at 10 °C or colder in a wind over 4.8 km/h, the heat index from 27 °C up, and the barometric formula to the top of the troposphere. Outside those the arithmetic still runs and the answer means nothing, so the tool says which rather than printing it.
- Does anything here use floating point?
- No. Every figure is exact decimal arithmetic, which is why 0.1 + 0.2 is 0.3 here and a unit conversion comes back to where it started. The one place a ceiling exists — how many digits an exponent may carry — is stated rather than reached silently.
- Is what I type uploaded anywhere?
- No. This page carries the whole tool as WebAssembly and runs it on your own device. A measurement is somebody's experiment and a load is somebody's building; none of it is sent anywhere.
Other tools for wiring and waves
Voltage drop
What a run of cable loses, and whether that is inside the limit somebody set
Transformer ratio
The turns, the voltages and the currents, with the losses named rather than modelled
Decibels
A ratio as decibels and back, with ten for a power and twenty for an amplitude
Antenna length
The wavelength a frequency has, and the four lengths cut from it
All thirty-nine tools