Phot to Lux Converter
Convert phots to lux instantly. Free, bidirectional, and fully in-browser.
About this tool
Phot to Lux Converter
Convert phots to lux instantly. Free, bidirectional, and fully in-browser.
1 phot equals 10000 lux — enter any phot value to convert it to lux instantly. This Phot to Lux converter is a client-side tool: it applies a single multiplication (lx = ph × 10000) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert lux back to phots. A reference table lists common phot values already converted, and nothing you enter is sent to a server.
How to use Phot to Lux Converter
- 1
Open Phot to Lux Converter on AltFTool — it loads instantly in your browser.
- 2
Type the value you want to convert into the Phot field.
- 3
Read the equivalent in lux in the result field, and copy it if needed.
- 4
Use the decimal-places slider for more or less precision, or press swap to convert lux to phots.
Why use Phot to Lux Converter
Instant, both ways
The result updates as you type, and the swap button flips the conversion to lux → phot without reloading.
Exact Illuminance math
The conversion uses the precise factor (lx = ph × 10000), so the number matches a manual calculation to the decimal places you choose.
Adjustable precision
A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.
Private and free
Everything runs locally in your browser — no upload, no account, no limit on conversions.
Common use cases
- Converting a phot measurement to lux for a spec, listing, or report.
- Checking phot↔lux figures while comparing products, datasets, or documentation.
- Learning the phot-to-lux relationship from the worked formula and the common-value table.
Frequently asked questions
How many lux are in a phot?
One phot is 10000 lux. Multiply the phot value by 10000 to convert. For example, 10 ph = 100000 lx.
What is the formula to convert phots to lux?
lx = ph × 10000. This tool applies it automatically and shows a worked example: 10 ph = 100000 lx.
Can it convert lux back to phots?
Yes. Press the swap button, or type into the lux field, and the tool converts lux to phots using the inverse of the same relationship.
Is the conversion accurate?
It uses the standard illuminance definition (lx = ph × 10000), not a rounded approximation, so results are exact to the number of decimal places you select.
Does this work offline and stay private?
Yes. The converter is a browser-side script with no network calls: your values are never uploaded, and once the page has loaded it keeps working without a connection.
Embed this tool on your site
Add the Phot to Lux Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
<iframe src="https://www.altftool.com/embed/widget/phots-to-lux-converter"
title="Phot to Lux Converter — free AltFTool widget"
width="100%" height="640" style="border:0;border-radius:12px;overflow:hidden"
loading="lazy" referrerpolicy="no-referrer-when-downgrade" allow="clipboard-write"></iframe>
<p style="font-size:12px;margin:4px 0 0">Widget by <a href="https://www.altftool.com/tools/all/phots-to-lux-converter?utm_source=embed&utm_medium=widget" rel="nofollow">AltFTool — free online tools</a></p>