Calculators
Smart tools for your pond, koi and water garden. Make accurate, informed decisions with easy‑to‑use calculators designed for Australian pond owners.
Available Calculators
Choose a calculator below to get precise measurements for koi health, pond running costs and long‑term maintenance planning.
Koi Weight Calculator
Estimate koi weight based on length and girth. Ideal for medication dosage, feeding calculations, growth tracking and transport planning.
Electricity Cost Calculator
Calculate the real cost of running pumps, filters, UV clarifiers, aerators and lighting. Compare efficiency and estimate monthly or annual running costs.
Why These Calculators Matter
- Accurate koi medication dosing
- Better feeding and water quality management
- Clear understanding of pond running costs
- Smarter pump and filtration choices
- Long‑term sustainability planning
More Tools Coming Soon
- Pond Volume Calculator
- Pump Sizing Calculator
- Filter Flow Rate Calculator
- Salt Dosage Calculator
About Water Garden World
Water Garden World helps Australian pond owners create thriving, beautiful water gardens. Our guides, calculators and product insights make pond keeping easier, more enjoyable and more sustainable.