WetMath: Aquarium Calculator

WetMath is your all-in-one aquarium calculator.
Built for freshwater and reef tank enthusiasts, WetMath helps you manage your aquarium setup with precision and ease. Whether you're planning a new build or maintaining a thriving reef, WetMath saves time, improves accuracy, and protects your aquatic life from costly mistakes.

Included Tools
• Tank Volume & Weight
Calculate total water volume and weight based on tank dimensions. Supports both US and metric units.

• Sand Bed Calculator
Estimate how much substrate you need and what it will weigh, depending on bed depth and tank footprint.

• Water Weight Converter
Convert between gallons, liters, and total water mass with real-time unit toggles.

• Salt Mix Adjustment (SG)
Dial in your salinity precisely. Enter current and target SG, and get real-time dosing recommendations using your brand’s salt concentration.

• Pump Flow & Turnover Rate
Determine how much water your pump should move per hour to meet reef or freshwater standards.

• Evaporation Estimator
Estimate daily water loss based on surface area, airflow, and temperature conditions.

• Power Cost Estimator
Calculate your monthly electricity costs for pumps and lights based on watt draw and daily usage.

Designed for Real-World Use
Supports both metric and imperial units
Runs fully offline — no login or cloud account required
Simple, mobile-optimized interface
Lightweight and fast, ideal for quick reference during setup or maintenance
Optional feedback and support available in-app
Who It’s For
Saltwater and reef tank hobbyists
Freshwater tank owners
Aquascapers
Aquarium maintenance professionals
DIY tank builders
Anyone managing a fish tank at home
Free with Optional Upgrade
All features are available for free with banner ads. A one-time in-app purchase removes ads and supports continued development.

Whether you're setting up a new system, fine-tuning salinity, or optimizing pump capacity, WetMath gives you accurate answers on the spot.