House Plumbing Calculator

Calculation details

Update the example values below.

Units

01Measurements

Count connections using

Bathrooms

rooms

Kitchens

rooms

Utility areas

areas

Supply pipe route length

Total length from your planned routes. The example uses 85 m; floor area does not determine pipe length.

Drainage pipe route length

Fixture purchasesTaps, basins, toilets and showers are separate from pipe fittings and connection accessories.

02Material detailsSizes, quantities and editable allowances.

The example counts hot supply, cold supply and each drain separately. Edit the room allowances to match your plumber’s point definition. Pipe lengths come from your routes.

Connections per bathroom

points

Connections per kitchen

points

Connections per utility area

points

Additional pipe length allowance

The guide uses 0%. Add an allowance only if it is not already in your measured lengths.

03Rates (optional)Use reference rates or your local quote.

Illustrative market baseline — edit to match your local dealer quote. Reference dated 29 Oct 2026; not live prices.

Leave blank for quantities only. Use 0 only for costs included elsewhere or free. Reference rates are editable examples, not dealer quotes.

Pipe rates are per metre in both unit modes. Job allowances cover the whole job; adjust them when the scope changes. Use 0 for work already included in a quoted rate.

Supply pipe · average rate

INR / m

Drainage pipe · average rate

INR / m

Fittings, valves and traps allowance

INR / job

Fixture connection accessories allowance

INR / job

Jointing materials and supports allowance

INR / job

Connection labour rate

INR / point

Chasing and agreed making good allowance

INR / job

Specified testing and checks allowance

INR / job

Transport and handling allowance

INR / job

How this is worked out

Check the formulas, allowances and scope before buying.

From measurements to materials

Room mode: connections = bathrooms × bathroom connections + kitchens × kitchen connections + utility areas × utility connections. Direct mode uses your entered connection count.

In the guide example, each hot supply, cold supply, waste or soil connection is counted separately: 9 per bathroom, 3 per kitchen and 3 per utility area. Two bathrooms, one kitchen and one utility give 24 points. Agree the counting convention with your plumber.

Supply and drainage lengths come from your pipe routes, not floor area or point count. Purchase length = entered route length × (1 + allowance/100). No full-pipe rounding is assumed when pricing per metre.

Pipe cost = length with allowance × rate per metre. Use an average rate only for an early budget; obtain separate quotes by specified system, size and class for purchasing.

Add fittings, connection accessories and jointing/support allowances once per job. Connection labour = defined points × labour rate. Chasing, testing and transport are separate job allowances; enter 0 if already included in another rate.

Fixture purchases are included only when selected. They are separate from pipe fittings and connection accessories. The guide reference gives ₹77,000 before fixtures and ₹1,12,000 with its ₹35,000 fixture allowance, using zero additional pipe allowance.

Assumptions to check

Rough indoor plumbing budget only. Pipe routes, systems, sizes, gradients, pressure requirements and testing must come from the responsible plumber or designer. Example counts and rates do not specify a system.

Tanks, pumps, water heaters, septic systems, external mains, rainwater systems, waterproofing, major repairs and taxes are excluded. Fixture purchases are excluded unless selected. Confirm the scope of making good and avoid double-counting bundled work.