Browse by Category

Select any calculator below, or jump straight to a category's full directory.

65+ Calculators
10 Categories
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Category 01
Volume & Capacity
11 calculators — rectangular, cylindrical, oval & more
Full Directory →
Rectangular Tank Volume Calculator Cylindrical Tank Volume Calculator Rooftop Tank Size Calculator Circular Tank Volume Calculator Horizontal Tank Volume Calculator Oval / Elliptical Tank Volume Calculator Underground Tank Volume Calculator Tank Litres to Gallons Converter Capsule Tank Volume Calculator Cone Bottom Tank Volume Calculator Spherical Tank Volume Calculator
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Category 02
Household Sizing & Water Requirement
6 calculators — home, apartment, commercial & institutional
Full Directory →
Daily Water Requirement Calculator Water Tank Size for Home Calculator How Long Will My Tank Last? Apartment Tank Size Calculator Commercial Tank Size Calculator School & Institutional Tank Size
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Category 03
Refill, Flow & Time
6 calculators — refill time, drainage, pipe sizing & pump power
Full Directory →
Tank Refill Time Calculator Water Flow Rate Calculator Tank Drainage Time Calculator Pipe Size & Flow Rate Calculator Water Meter Reading Calculator Pump Horsepower & Flow Rate
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Category 04
Weight & Structural Load
5 calculators — tank weight, rooftop load & safe capacity
Full Directory →
Water Tank Weight Calculator Rooftop Load Bearing Calculator Water Weight Calculator Tank Weight Per Sq Ft Calculator Safe Rooftop Tank Load Calculator
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Category 05
Pressure & Height
6 calculators — water pressure, pump head, gravity feed & more
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Water Pressure Calculator Pump Head Pressure Calculator Gravity Feed Flow Rate Calculator Hydrostatic Pressure Calculator Water Column Pressure Calculator Minimum Tank Height for Shower Pressure
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Category 06
Water Treatment & Purification
10 calculators — chlorine, bleach, TDS, pH, UV & filter
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Chlorine Dosage Calculator Bleach to Water Ratio Calculator Water Tank Disinfection Calculator Water Hardness Calculator TDS Water Calculator Water pH Adjustment Calculator Potassium Permanganate Dosage Calculator Safe Water Storage Duration Calculator UV Disinfection Tank Calculator Water Filter Flow Rate Calculator
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Category 07
Rainwater Harvesting
7 calculators — catchment, collection, ROI & payback
Full Directory →
Rainwater Harvesting Calculator Roof Catchment Area Calculator Annual Rainwater Collection Calculator First Flush Diverter Size Calculator Rainwater Savings Calculator Rainwater Harvesting ROI Calculator Rainwater Harvesting Payback Calculator
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Category 08
Agricultural & Irrigation
9 calculators — crop needs, drip, sprinkler & livestock
Full Directory →
Irrigation Water Requirement Calculator Crop Water Need Calculator Drip Irrigation Tank Size Calculator Farm Water Storage Calculator Livestock Water Requirement Calculator Sprinkler Water Usage Calculator Irrigation Pump Size Calculator Field Irrigation Tank Sizing Calculator Greenhouse Water Usage Calculator
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Category 09
Cost & Comparison
8 calculators — tank cost, savings, plastic vs steel & more
Full Directory →
Water Tank Cost Calculator Plastic vs Steel Tank Cost Comparison Water Bill Savings Calculator Tank Installation Cost Estimator Water Delivery vs Tank Cost Borehole vs Mains Water Cost Calculator Water Storage Cost Per Litre Calculator Underground vs Rooftop Tank Cost
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Category 10
Emergency & Survival
6 calculators — 72-hour kit, off-grid, stockpile & disaster prep
Full Directory →
Emergency Water Storage Calculator 72-Hour Water Supply Calculator Water Stockpile Duration Calculator Bug-Out Bag Water Calculator Off-Grid Water Storage Calculator Hurricane & Disaster Water Prep