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API · /wallpaper-api

Wallpaper Calculator API

healthy 4,222 Subscribers

Wallpaper-estimating maths as an API, computed locally and deterministically. The rolls endpoint uses the proper drop method: it works out how many full-height drops come from each roll, floor(roll length ÷ (wall height + pattern repeat)), how many drops the room perimeter needs, ceil(perimeter ÷ roll width), and from those the rolls required — so a larger pattern repeat correctly increases the count. The simple endpoint gives a quick area-based estimate, rolls = ceil(wall area·(1+waste) ÷ roll coverage), handy for plain papers. The cost endpoint totals the project from the rolls and price per roll plus the adhesive, with one tub of paste hanging about five rolls. The standard roll of 10.05 m × 0.53 m is assumed unless you override it. Everything is computed locally and deterministically, so it is instant and private. Ideal for home-decor, renovation and trade app developers, DIY and room-planning tools, and decorator and retailer calculators. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is wallpaper estimation; for wall paint use a paint API and for floor tiles use a flooring API.

#wallpaper #home-decor #renovation #estimating #diy #developer-tools
api.oanor.com/wallpaper-api
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Machine-readable spec so AI agents can integrate this API.

/api/wallpaper-api/openapi.json
/api/wallpaper-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
89 ms
Server probes · 24h
Subscribers
4,222
active
Total calls
32
last 7 days
status Full status page → · 20 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 2,000 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • Drop-method roll count for a single rectangular room
  • Pattern-repeat waste adjustment
  • Metric and imperial units
  • 2 requests/sec
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Starter

€4.00 /month

  • 15,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • Multi-wall rooms with doors and windows deducted
  • Straight and offset pattern-repeat handling
  • Per-roll coverage and trim-loss breakdown
  • Email support
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Pro

€12.00 /month

  • 80,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • Whole-property batch estimates across many rooms
  • Adhesive and lining-paper quantity add-ons
  • Total-cost output from price-per-roll input
  • Priority support
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Mega

€39.00 /month

  • 400,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • High-volume estimating for decorator and retailer tools
  • Bulk room batches in one call
  • Configurable waste factor and pattern-match rules
  • 99.9% uptime SLA
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Related APIs

Other APIs with overlapping tags.

Drywall Calculator API

Drywall (plasterboard) material-estimation maths as an API, computed locally and deterministically. The sheets endpoint computes how many boards a wall or ceiling needs — the area (given directly, or as perimeter × height, or length × width) divided by the sheet area, with a waste allowance — and the number of screws (about 32 per standard sheet). The compound endpoint estimates the joint compound in kilograms and the joint tape in metres for taping and finishing the boarded area, with adjustable per-square-metre factors for your product and number of coats. The cost endpoint totals the project from the sheets and their price plus the compound and tape. The standard 2.4 × 1.2 m board is assumed unless you override it. Everything is computed locally and deterministically, so it is instant and private. Ideal for construction, renovation and trade app developers, drywall and plastering estimators, and builder and retailer tools. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is drywall material estimation; for insulation R-values use a U-value API and for wall paint use a paint API.

api.oanor.com/drywall-api

Roof Pitch API

Roofing geometry as an API, computed locally and deterministically. The pitch endpoint converts freely between the three ways trades describe a roof slope — the pitch as rise per 12 of run (the X:12 notation), the angle in degrees and the slope as a percentage — using angle = atan(pitch/12); a 6:12 roof is 26.57° and a 50 % slope, and it also returns the pitch multiplier √(1 + tan²) that scales a flat plan length to the true along-slope length. The rafter endpoint computes the common rafter length from the horizontal run and the pitch, rafter = √(run² + rise²) with rise = run·tan(angle), and adds the along-slope length of an optional horizontal overhang — a 12-unit run at 6:12 needs a 13.42-unit rafter. The area endpoint converts a flat building footprint into the actual sloped roof surface area, footprint / cos(angle), the figure you need to order shingles, membrane or underlay; a 100 m² footprint under a 6:12 roof is about 111.8 m². Lengths are unit-agnostic — use a consistent unit. Everything is computed locally and deterministically, so it is instant and private. Ideal for roofing, construction, contractor-estimating, home-improvement, solar-install and architecture app developers, take-off and material-ordering tools, and trade software. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is roofing-specific geometry; for a general grade or gradient use a slope API.

api.oanor.com/roofpitch-api

Paint Calculator API

Paint estimating and mixing maths as an API, computed locally and deterministically. The coverage endpoint works out how much paint an area needs — paint = area × coats ÷ spreading rate — from an area (in square metres or square feet), the number of coats and the paint's coverage (in m² per litre or square feet per US gallon, defaulting to a typical emulsion), and returns the volume in litres and US gallons and, given a tin size, the number of tins to buy. The room endpoint computes the paintable wall area of a room from its length, width and height — perimeter × height minus the door and window openings, optionally plus the ceiling — and then the paint needed, with sensible default door and window sizes you can override. The ratio endpoint splits a total volume by a mixing ratio such as 4:1 (base to hardener) or 4:1:10 (base, hardener, thinner) into each component's amount and percentage, or scales the whole mix up from one known component amount — for two-part epoxies, catalysed paints and thinning. Everything is computed locally and deterministically, so it is instant and private. Ideal for decorating, trade and DIY tools, hardware-store and paint-shop apps, estimating and quoting software, and home-improvement projects. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is paint coverage and mixing; for mulch, soil and gravel volumes use a landscaping API.

api.oanor.com/paint-api

Fence Calculator API

Fencing material estimating as an API, computed locally and deterministically. The posts endpoint works out the number of fence sections, line posts and rails for a run from its length and the post spacing, plus the total rail length. The pickets endpoint computes how many pickets or boards a length needs from the picket width and the gap between boards (set the gap to zero for a privacy fence). The materials endpoint produces a full bill of materials in one call — posts, rails, pickets and the concrete for the post holes, in cubic feet and metres and in 80 lb pre-mix bags — from the fence dimensions and the hole size and post depth. Everything is computed locally and deterministically, so it is instant and private. These are estimates: allow extra for waste, gates and corner posts, and follow your local building code for post depth and footing size. Picket width and gap are in inches; length can be feet, yards or metres. Ideal for fencing contractors and estimators, DIY and home-improvement tools, and landscaping and quoting software. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This is fencing materials; for paint, tile and concrete use a construction-calculator API and for mulch and gravel use a landscaping API.

api.oanor.com/fence-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Wallpaper Calculator API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Wallpaper Calculator API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Wallpaper Calculator API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Wallpaper Calculator API cost?
Wallpaper Calculator API has a free tier with 100 calls / month. Paid plans start at €4.00 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Wallpaper Calculator API GDPR-compliant?
All requests to Wallpaper Calculator API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/wallpaper-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/wallpaper-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/wallpaper-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/wallpaper-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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