Pond CalculatorFree pond calculators for volume, liner size, pump flow rate, filter sizing, fish stocking, treatment dosage, water change, and UV sterilizer. Essential tools for garden pond design.Pond Volume Calculator — Calculate water volume (gallons/liters) by pond dimensions — rectangular, circular, oval, and irregular shapesLiner Size Calculator — Calculate required pond liner dimensions with depth and overhang allowancePump Flow Rate Calculator — Calculate recommended pump flow rate (GPH/LPH) based on pond volumeFilter Sizing Calculator — Calculate recommended filter capacity based on pond volume and fish stocking levelFish Stocking Calculator — Calculate maximum fish count based on pond volume and fish speciesTreatment Dosage Calculator — Calculate salt and chemical treatment dosages based on pond volumeWater Change Calculator — Calculate water change volume and estimated time based on change percentageUV Sterilizer Calculator — Calculate recommended UV sterilizer wattage based on pond volume and sun exposureDe-icer / Heater Calculator — Calculate required wattage for pond de-icer or full heating based on surface area and lowest temperatureWaterfall Pump Calculator — Calculate required GPH, pipe friction head loss, and total dynamic head for your pond waterfallKoi Feeding Calculator — Calculate daily koi feeding amount by fish count, size, and water temperaturePond Aeration Calculator — Size your air pump and diffuser based on pond volume, fish load, and depthPond Heater Sizing Calculator — Calculate required heater wattage to maintain target water temperature in winterPond Edge / Shoreline Calculator — Calculate pond shoreline length for edging, liner, and planting — rectangular, circular, oval, and irregular shapesAlgae Growth Risk Calculator — Assess algae bloom risk based on daily sunlight hours, water temperature, and nutrient level