🐠 Aquarium Size Calculator · Pro Edition
Precise volume & advanced husbandry metrics — worldwide gallons/liters, USA standards & global references
📏 Tank Dimensions
📏 Inches (in)
📐 Centimeters (cm)
⚡ Global standards — Results in US Gallons, Liters, Lbs/Kg, and expert recommendations based on modern fishkeeping guidelines (USA & International).
📊 Aquarium Vital Metrics
📈 Comparative analysis: Volume vs Stocking vs Flow
*Stocking capacity based on 0.75 inch per US gallon (conservative). Filter flow @6x turnover.
🧭 How to use this aquarium size calculator
- 1 Enter length, width, height of your tank (or planned dimensions).
- 2 Choose inches or centimeters — global unit support.
- 3 Optionally add a model year (any year like 2024–2026).
- 4 Instantly see volume (US gal + liters), water weight, substrate, heater wattage, filter flow, and max fish length.
- 5 The dynamic graph compares volume, safe fish capacity & filter performance.
🐟 Expert pro tips
✅ “1 inch per gallon” is outdated – modern approach: 0.5–0.75 inch per gallon for community tanks. Our calculator uses conservative 0.75in/gal.
✅ Heater rule (USA standard): 3–5 watts per gallon. We recommend 4W/gal as baseline.
✅ Substrate depth: 1.5–2 inches planted; fine sand/gravel weight matters – our estimate uses 1.5” depth & gravel density.
✅ Always cycle before adding livestock. Larger water volume = more stability.