VAT Calculator

Add or remove Irish VAT on any price - rounded to the nearest cent, exactly like Revenue does.

Price

€

Use a dot or comma for decimals, e.g. 149.99 or 149,99

VAT rate

%

Quick selections:

This session

Nothing here yet - every calculation you make will be kept for this browsing session.

Flow Converter

Convert between litres, cubic metres and US gallon flow rates.

Value

Convert to

Quick selections:

How it works & typical values

This session

Nothing here yet.

DI Resin Lifetime

Estimate how long a DI resin cartridge or bag will last from your water quality and resin volume.

1. Water quality

Quick selections:

Feed water

2. Resin volume

Quick selections:

Resin volume (litres)

L

Service flow ≈ 0.33–1 L/min per litre of resin (20–60 bed volumes/h).

3. Resin

Resin

Working capacity 0.60 eq/L.

4. Design & usage

Design factor

Daily usage (L/day, optional)

L/day

Blank = litres-only estimate.

How it works & typical values

This session

Nothing here yet.

Activated Carbon Lifetime

Estimate how long dechlorination carbon will last based on your chlorine load and bed size.

1. Water quality

Quick selections:

Free chlorine

mg/L

2. Carbon volume

Quick selections:

Carbon volume (litres)

L

3. Usage (Optional)

Daily usage (L/day, optional)

L/day

Blank = litres-only estimate.

How it works & typical values

This session

Nothing here yet.

Backwash Calculator

Estimate the water used during a Clack WS1 backwash or softener regeneration cycle, and the feed flow you need to supply it.

1. Cycle & flow

Quick selections:

DLFC size (drain rate)

US gpm

2. Cycle times (minutes)

How it works & typical values

This session

Nothing here yet.

Coming soon

This tool is on the way. Check back soon.