Free Koi Pond Tools & Calculators

Interactive tools for serious koi keepers. Calculate volumes, plan quarantines, schedule maintenance, and track water quality -- all client-side, free, no login required.

Pond Volume Calculator

Calculate your koi pond or quarantine tank volume in gallons and liters. Supports rectangular, circular, and oval shapes.

Quarantine Plan Generator

Create a 14-21 day separation, observation, water-testing, and recordkeeping checklist for a new fish.

Water Change Scheduler

Plan your water change routine with exact gallons per change and a calendar of the next 8 occurrences.

Parameter Trend Chart & Alert Setup

Log and visualize water parameters over time. Track ammonia, nitrite, nitrate, pH, and temperature with automatic alerts.

Product Label Math

Check arithmetic using values and compatible units copied from a current product label. Not a treatment recommendation.

Symptom Timeline Builder

Build a shareable symptom timeline with dates, symptoms, and notes to share with your vet or dealer.

New Fish Intake Checklist

Step-by-step receiving checklist for new koi covering acclimation, documentation, and first-week monitoring.

Filtration Maintenance Schedule

Generate a 6-month filtration maintenance calendar based on your filter type and bioload level.

Winterization Checklist

Climate-zone-specific winterization plan covering fall prep, feeding transitions, equipment care, and spring restart.

"What Changed?" Daily Comparison

Compare yesterday and today's water parameters to quickly spot concerning trends and get automatic alerts.

Want these tools integrated into a full koi care OS?

KoiQuanta connects your calculations to protocols, reminders, and shareable reports.