Quick budget
Multiply total built-up area by your rate, apply the selected adjustment and contingency, then review a range around the midpoint. The cost breakdown is illustrative.
Make a budgetEstimation methodology
Follow the numbers from measurement to cost.
An estimate is easier to check when you can see what was measured, which assumptions were used and what you need to buy. Kitna Lagega keeps those stages visible so you can review the result before using it.
Start at the level of detail you have.
You can begin with an overall floor area or with individual surfaces. Each approach answers a different planning question.
Quick calculators
Enter approximate measurements directly, check the material assumptions and add prices if needed. These calculations are not saved.
Choose a toolLayout-based estimates
Save rooms, walls and openings in a layout. Select that layout when creating an estimate, then choose the work, materials and prices.
Open layoutsTrace a measured estimate through four stages.
The formula depends on the work, but the calculation follows the same sequence. The result explains the quantities and cost basis used for that job.
- 01
Measure the work
Find the area, length or volume that the work uses. A wall finish uses wall area; a floor finish uses floor area. Layout-based calculations account for the openings and surfaces selected for that work.
- 02
Apply the material assumptions
Use product coverage and coats for paint, tile dimensions and box sizes for tiling, or specified proportions and thicknesses for mortar and concrete. The assumptions are shown with the calculation so you can review them.
- 03
Allow for buying materials
Add the entered wastage allowance and round to the purchase units used by that tool, such as whole bags, packs, pieces or boxes. Review both the calculated requirement and the quantity to buy.
- 04
Add prices and labour
Material cost uses the purchase quantity and your entered price. Labour uses the basis shown in the result, such as net area, length or volume. Add the cost lines to get the estimate.
See the difference between a requirement and a purchase.
This paint example uses 100 ft², two coats, coverage of 120 ft² per litre per coat, 5% wastage and 1-litre packs. These are example inputs, not a product recommendation.
- Paint before wastage
- 100 × 2 ÷ 120 = 1.67 L
- Including 5% wastage
- 1.75 L
- Whole 1-litre packs
- 2 packs · 2 L to buy
Check the result, then save the version you need.
Before ordering or agreeing a price, check the measurements, product details, purchase rounding and work covered by each rate.
Read missing prices correctly
In quick calculators, a blank rate stays unpriced. A partial cost includes only the entered rates. Enter zero only when that cost is free or included elsewhere. Taxes, delivery and other charges need to be included in your rates or allowed for separately.
Keep the measured version
A saved estimate keeps its configuration, result and a snapshot of the source layout revision. Editing the reusable layout later leaves that saved estimate intact. You can create several independent estimates from the same layout.
Structural tools calculate quantities
Concrete tools scale the supplied mix inputs. Rebar tools use supplied bar dimensions, counts, spacing or schedules. They do not select reinforcement, size members or verify the structure. Use the approved project information for those inputs.
If a result looks wrong, use “Report an issue with this result” beneath it. The feedback form lets you identify the calculator and describe the issue; your saved measurements and estimates are not attached automatically.
Use a calculation you can check.
Start with the measurements you have and review each assumption before using the result.