Water Usage

Features

• Showers / baths / laundry / flushing / dishwashing / watering listed item by item, so the heaviest use stands out
• ⚠️ Every preset flow is a named constant with a source (showers 8–15 L/min, front-load 40–60 L, top-load 120–180 L…)
• ⚠️ Totals in litres and cubic metres, noting 1 m³ = 1000 litres
• A daily average, compared with per-capita daily use
• Names the largest use and its share
• Toilets switch between single and dual flush; dishes between machine and hand
• Washers switch between front-load and top-load (a three-fold difference)
• Computed locally with no network requests

How to use

1. Pick a shower flow and enter the shower minutes per month
2. Enter baths and laundry loads, and pick the washer type
3. Enter flushes per day and whether the toilet is dual flush
4. Pick the dishwashing method and count, then the watering minutes and area
5. The right-hand side gives itemised use, the total in litres and m³, the daily average and the largest use

FAQ

How many litres is one cubic metre?

1 m³ = 1000 litres. Water utilities bill in cubic metres (often called tonnes), while every item here is in litres, so the total is divided by 1000. 12,000 litres a month is 12 m³. There is no approximation in this step, and an error is a factor of a thousand — which is why it gets its own line.

Why does a top-load washer use so much more?

Because of how it works. A front-load lifts and drops the laundry, so the water only needs to reach the bottom of the drum — typically 40–60 L a load. A top-load uses the water itself to agitate and clean, so the clothes must be submerged — typically 120–180 L a load, about three times as much. The washer type is therefore an option here: pick the wrong one and the laundry item is off by three-fold.

My numbers are for the whole household — how do I compare per person?

The per-capita comparison takes your daily total and compares it directly with a per-person benchmark, so if your counts cover a whole household (a family total of flushes, say), divide by the number of people first, or read it as “the household uses as much as N people would”. The benchmark is about 135 L per person per day, an order-of-magnitude reference only; regions vary a lot.