PPM (500 Scale) to EC Converter
Chart says 800 PPM (500 scale), meter reads EC — target 1,600 µS/cm. Quick reverse conversion.
Calculator
PPM (500 Scale) to EC Converter
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Chart says 800 PPM (500 scale), meter reads EC — target 1,600 µS/cm. Quick reverse conversion.
How to use this calculator
- Enter PPM.
- Divide by 0.5.
- Read EC.
The formula
EC = PPM ÷ 0.5 (500 scale)
Reverse of the 500-scale conversion.
What the units mean
PPM (parts per million) — one part of solute per million parts of the total mixture. The workhorse unit for trace concentrations in water, air, and food.
µS/cm — microsiemens per centimeter, the unit of electrical conductivity (EC) that meters actually measure before converting to a PPM estimate.
Worked example
800 PPM → 1,600 µS/cm.
Quick reference
| PPM | EC |
|---|---|
| 500 | 1,000 |
| 800 | 1,600 |
| 1,000 | 2,000 |
500 scale.
Where you will actually use this
For meters that only display EC.
- EC meter users
- Chart conversion
Mistakes that give wrong answers
- Wrong scale
Key takeaways
- Formula: EC = PPM ÷ 0.5 (500 scale)
- Remember: 500 scale.
- Watch out for: Wrong scale
- Next step: run your own numbers in the calculator above, then verify with a measurement — calculated values are only as good as the inputs.
Frequently asked questions
How do you convert 500-scale PPM to EC?
Divide by 0.5.