Water Tank Calculator Tools
Four free calculators to help you estimate the right size and capacity of GRP water tank for your project – from a simple domestic build to a large commercial site. Get a quick, indicative answer in minutes, then talk to us to confirm the details.
BY ROLE
Other calculators
Planning a New Project
"What size tank do I need?"
Get a preliminary tank size and model suggestion to work with early in your design.
Reviewing an Existing Building
"Is our current tank big enough?"
Estimate the storage a building of your type and occupancy would typically need.
Fire Protection Project
"How much fire water storage?"
Get an indicative volume for sprinkler or wet riser storage before detailed design.
Tank & Pump Package
"I need a tank and a pump together."
Put together an outline tank and booster pump package for your site.
The Tools
Four calculators to get you started
Each one gives you a quick, indicative result. Use it to shape your thinking and your budget – then bring the result to our team to confirm the specification.
01
Water Tank Size Calculator
Turns a storage volume into a suggested Tricel tank model – one-piece, two-part, or sectional – with approximate dimensions and weight.
- Suggests a stocked tank model to match your litres
- Flags where restricted access may favour a sectional build
- Suitable for domestic through to large commercial projects
02
Water Tank Capacity Calculator
Estimates how much cold water storage a building might need based on its type and occupancy — hospitals, hotels, offices, and factories.
- Simple, occupancy-based estimate
- Covers domestic and commercial building types
- Feeds straight into the size calculator above
03
Sprinkler & Wet Riser Tank Size Calculator
Gives an indicative dedicated fire water storage volume based on your building’s hazard type and required duration of supply.
- Simple hazard-category selection
- Separate from domestic cold water demand
- Links through to Tricel’s sprinkler tank range
04
Elvaro Tank Builder
Put together an outline GRP tank and Elvaro water pressure booster set based on your site’s space and rough duty requirements.
- Pairs an estimated tank volume with a pump option
- Generates a reference to discuss with our team
- Useful starting point for combined tank & pump projects
Common Questions
FAQs
Are the calculator results accurate enough to order a tank?
The calculators give an indicative estimate to help you understand roughly what size or capacity of tank you may need. They’re a starting point, not a specification. For an exact figure and a confirmed tank model, contact Tricel Water UK directly – a technical adviser will work through your project details with you.
What is the difference between the tank size calculator and the tank capacity calculator?
The capacity calculator gives a rough idea of how many litres of storage a building might need, based on occupancy and building type. The size calculator then suggests which Tricel tank model could match that litre figure. Both are estimates – contact Tricel to confirm the right tank for your project.
How is a fire sprinkler tank sized?
Sprinkler and wet riser tank volume depends on the building’s hazard category and required duration of supply, which varies project to project. The sprinkler calculator gives an indicative figure only – Tricel’s technical team should confirm the exact volume for any fire protection project.
Do I need a sectional tank or a one-piece tank?
One-piece tanks generally suit smaller capacities and straightforward access, while sectional tanks are built on site from panels and suit larger capacities or restricted access. The right choice depends on your specific site – Tricel’s team can confirm which is appropriate once you share your project details.
What should I do with my calculator result?
Treat the result as a guide for early planning and budget conversations. Before ordering or specifying a tank, send your result to Tricel Water UK – a technical adviser will review your project and confirm the correct tank model and configuration.
SPEAK WITH US DIRECTLY
Ready to turn your estimate into a specification?
Calculators are a great starting point, but every site is different. Send your result to our technical team and we’ll confirm the right tank for your project.
The calculators are a guide, not a specification. Cold water storage tanks are project-specific. Contact Tricel’s technical team to confirm the exact volume required for your system. © 2026 Tricel Water. All rights reserved.
