Aquarium Dose Calculator is the complete aquarium dosing calculator for reef tanks, planted aquariums, and freshwater setups. Calculate precise doses for fertilizers, medications, water conditioners, and salt mixes—all in one app.

✦ WHY AQUARISTS CHOOSE Aquarium Dose Calculator

No more guessing how much fertilizer to add or converting between drops and milliliters. Aquarium Dose Calculator gives you accurate dosing calculations instantly, whether you're maintaining a thriving reef tank or growing a lush planted aquarium.

Built for real aquarium hobbyists who need reliable tools at the tank. Works completely offline—no internet required when you're doing water changes or treating sick fish.

✦ PLANTED TANK FERTILIZER CALCULATOR

Master your planted tank dosing with support for multiple methods:
- EI Dosing (Estimative Index) calculator with weekly reset schedules
- PPS-Pro perpetual dosing calculations
- Target PPM calculator for macros (NPK) and micros
- DIY dry fertilizer mixing from KNO3, KH2PO4, K2SO4, and trace mixes
- Commercial fertilizer dosing for Seachem Flourish, API Leaf Zone, Tropica, Easy Green, and more

Calculate exact grams or milliliters needed based on your actual tank volume—not the manufacturer's rated size.

✦ REEF TANK DOSING CALCULATOR

Keep your reef chemistry balanced with precision alkalinity, calcium, and magnesium dosing tools:
- Two-part and Balling method calculators
- Alkalinity (dKH) adjustment calculator
- Calcium and magnesium dosing for coral growth
- Salt mix calculator for water changes and top-offs
- Specific gravity to PPT conversion

Whether you dose manually or use an automatic doser, Aquarium Dose Calculator helps reef hobbyists maintain stable parameters that corals demand.

✦ MEDICATION DOSAGE CALCULATOR

When fish get sick, accurate medication dosing matters. Aquarium Dose Calculator includes dosing calculators for common aquarium treatments:
- Ich and parasite treatments with therapeutic copper levels
- Antibacterial medications
- Antifungal treatments
- Quarantine tank dosing at reduced volumes

Calculates doses based on actual water volume after accounting for substrate and decorations.

✦ WATER CONDITIONER CALCULATOR

Instantly calculate water conditioner doses for:
- Seachem Prime and Safe dosing
- API Stress Coat and Tap Water Conditioner
- Other dechlorinators and conditioners

Know exactly how many drops or milliliters to add during water changes. Supports both freshwater aquarium and saltwater aquarium setups.

✦ TANK VOLUME CALCULATOR

Accurate dosing starts with knowing your real water volume. Calculate volume for any tank shape:
- Rectangular and cube aquariums
- Bowfront and corner tanks
- Cylindrical and hexagonal tanks
- Custom dimensions with substrate displacement

Convert instantly between gallons, liters, and cubic inches. Supports both US and UK gallons for aquarists worldwide.

✦ FEATURES AQUARIUM HOBBYISTS NEED

→ Multiple dosing methods: EI dosing, PPS-Pro, lean dosing, and brand-specific calculations
→ Unit conversions: ppm, mg/L, drops, mL, grams, gallons, liters
→ Offline functionality: Works without internet at your aquarium
→ Clean interface: Fast calculations without complicated menus
→ Both freshwater and saltwater: One app for planted tanks and reef tanks
→ Save your tanks: Store multiple aquarium profiles with their volumes

✦ BUILT FOR THE AQUARIUM COMMUNITY

Created by fishkeepers for fishkeepers. Aquarium Dose Calculator addresses the real problems aquarists face: confusing manufacturer dosing instructions, unit conversion headaches, and the math required for DIY fertilizer mixing.

Whether you're a beginner setting up your first fish tank or an experienced reef hobbyist fine-tuning calcium reactor output, Aquarium Dose Calculator provides the aquarium calculator tools you need.

Download Aquarium Dose Calculator today and take the guesswork out of aquarium dosing.