Targets in ppm, mmol, meq
Hoagland, lettuce, tomato, or tissue analysis. Water test and alkalinity acid come off before the solve.
Nutrient calculator
Coming soon
Salt weights from ppm and EC.
MixPPM is the web mixer for growers who weigh their own salts. Set elemental targets, tick the products you have, and get tank grams to three decimal places.
Private testing for now — accounts and paid plans open when Stripe is live. You can still look around the calculator.
Your products
Full salt library plus bag N–P₂O₅–K₂O. Direct tank or A+B+C stocks. Grams, kg, ounces, pounds.
EC, mix log, CSV
Predicted EC, dry-mix %, a tank dose card, and a mix journal for meter EC and pH.
Saved recipes
Free accounts keep 1. Monthly and yearly unlock unlimited and public profile pages.
Three steps, then weigh.
01
Volume and targets
Litres or gallons. Elemental ppm, not oxide. Optional water test.
02
Tick the salts
Use the library or add a commercial product from the guaranteed analysis.
03
Calculate
Tank grams to 0.001 g. Edit doses and watch the mix table update live.
Common questions, answered.
- What is MixPPM?
- A hydroponic nutrient calculator. Set elemental ppm or EC, tick the salts you have, and get tank grams to three decimal places.
- Like HydroBuddy?
- Same job as HydroBuddy, in the browser: oxide conversions, salt library, custom products, plus mix logs and saved recipes.
- Do I need an account?
- Open the calculator without one. Sign in to calculate, save recipes, and keep a mix log.
Look around. Sign-up opens soon.
The calculator is open to browse. Accounts, mix log, and subscriptions are in private testing.