Nine free interior design tools
The same calculators our team uses on live projects — cost estimation, area take-off, layout planning, colour, paint, tiling, lighting, orientation and finance. Free, instant, no signup.
1 · Interior cost estimator
Enter your carpet area and scope. You get an itemised budget range, a cost distribution chart and an indicative timeline — in about a minute.
Estimated project value
Indicative timeline: — from design freeze to handover.
Cost distribution
How the budget splits across trades
Rates are indicative India figures for turnkey interiors, inclusive of design, material, labour and 18% GST. Your BOQ after a site survey gives the fixed price.
2 · Room area & material take-off
Floor, ceiling, wall and skirting quantities from three dimensions — plus AC tonnage and the rug size that will actually fit.
Carpet area
Openings are deducted at standard sizes. For exact quantities we laser-measure on site — these figures are for planning and budgeting.
3 · 2D room planner
Drag real-scale furniture into your room, check circulation before you buy anything, and export the layout as a PNG to share with your carpenter.
Layout check
floor left free
Rule of thumb: keep 30–36″ for main walkways, 18″ between sofa and coffee table, and 36″ in front of wardrobes so doors clear.
4 · Colour palette & mood board generator
Six harmony rules, a live room preview, an auto-generated mood board and copy-ready hex codes for your painter.
60 / 30 / 10 allocation
Room preview
The same palette applied to a simplified room
5 · Paint quantity & cost calculator
Litres, primer, the exact bucket sizes to buy and the total painting cost — from your wall area, coat count and paint system.
Paint required
Material vs labour
Where the painting budget goes
6 · Tile & flooring calculator
Tiles, boxes, adhesive and total cost with pattern-specific wastage — because herringbone wastes far more than stack bond.
Tiles to order
Always order full boxes from a single batch — dye lots vary between production runs and a mid-floor colour change is impossible to hide.
7 · Lighting & lumen planner
Proper lumen-method fixture counts by room type, with connected load, monthly running cost and a suggested spacing grid.
Fixtures required
This is the lumen method: total lumens = lux × area ÷ (maintenance factor × utilisation factor). Split the result across ambient, task and accent layers rather than putting it all in the ceiling.
Suggested fixture grid
Even spacing for the calculated count
8 · Vastu orientation guide
Check any room against its traditional zone, understand the reasoning, and see what we do when the structure cannot move.
Assessment
Offered because clients ask for it. We treat Vastu as a planning input, never as a reason to demolish sound construction.
9 · Interior EMI & budget planner
Turn a project value into a monthly number, with total interest, total outflow and a full amortisation schedule.
| # | EMI | Principal | Interest | Balance |
|---|
Monthly instalment
Ask us about 0% consumer EMI on selected modular and appliance brands for 3–12 months. Bank personal-loan rates for interiors currently run 10.5–16% p.a.
Principal vs interest
Share of total repayment
About these calculators
Are these interior design calculators free?
Yes — all nine tools are free, need no signup, and run entirely in your browser. Nothing you type is uploaded or stored anywhere.
How accurate is the interior cost estimator?
It typically lands within 10–15% of the final BOQ for a standard apartment scope. It applies real India rates by package, city tier and property type. The exact figure comes from a site survey and an itemised bill of quantities.
Can I use the 2D room planner on my phone?
Yes. The planner uses pointer events, so dragging works with touch, mouse or stylus. On a small screen, rotate to landscape for the most usable stage size.
Do the tools work offline?
Once the page has loaded, yes. All calculations are local JavaScript with no server calls, so you can keep working on a site visit with poor signal.
Let's design something you'll still love in 2036.
Share your floor plan and budget. Within 48 hours you'll have a written scope, an indicative BOQ and a realistic timeline — no obligation, no sales pressure.