Reef Dosing Calculator

Calculate precise dosing amounts for calcium, alkalinity, magnesium, and essential reef parameters

Our professional reef dosing calculator helps you determine the exact amount of additives needed to maintain optimal water chemistry in your saltwater aquarium. Whether you're dosing calcium, alkalinity (KH), magnesium, nitrates, or phosphates, our calculator provides accurate measurements based on your tank volume and current parameter levels. Perfect for maintaining stable reef tank conditions and promoting healthy coral growth.

Select Parameter
Aquarium Volume

Enter the total volume of water in your aquarium, including the sump.

Selected Additive

Choose the additive for which you want to calculate the dosing amount.

Current Measurement

Use slider to set the latest measurement value of the selected parameter.

410 ppm
Current Level
360500
Desired Target Value

Use slider to set the target value you aim to achieve for this parameter.

420 ppm
Target Level
360500
Ideal Alkalinity:8.3 dKH
Required Dosage

This is the calculated amount of the chosen additive needed to reach your target value.

0ml
Required Daily Dose

Achieve perfect water chemistry with precise dosing calculations that prevent parameter swings and ensure optimal coral health.

Simply enter your tank volume, current parameter levels, and target values. Our calculator will determine the exact dosing amount needed using proven reef chemistry formulas.

Precise Calculations

Laboratory-grade accuracy for all reef parameters including calcium, alkalinity, and magnesium dosing.

Cost Analysis

Track your reef aquarium expenses with detailed cost analysis for all popular dosing brands.

Brand Support

Compatible with Red Sea, Tropic Marin, Seachem, Aquaforest, and many more reef additives.