Please note that you can view the results on all calculators for FREE, but additional options: advanced reports, downloading results (report + drawings + 3D), placing the logo on the drawings and other privileges — requires PAYMENT.
* prices may vary slightly due to differences in exchange rates
Pricing Plans
Includes | No plan | Plan | Plan «Pro» |
| Calculation | ✔️ | ✔️ | ✔️ |
| Access to the results | ✔️ | ✔️ | ✔️ |
| Saving results in your personal account | ✔️ | ✔️ | ✔️ |
| Store results for 180 days | ✔️ | ✔️ | ✔️ |
| Technical support | ✔️ | ✔️ | |
| Access to hidden drawings | ✔️ | ✔️ | |
| Unlimited results saves (download) | ✔️ | ✔️ | |
| Tool «3D-ruler» (sizes) | ✔️ | ✔️ | |
| Custom logo on drawings | ✔️ | ||
| $0/month | $14/month* *billed monthly Choose | $19.71/month* *billed monthly Choose | |
$8.4/month* *billed annually Choose | $11.83/month* *billed annually Choose |
- month the equivalent of 30 calendar days
- subscriptions are not automatically renewed, after the period expires, debits from your personal account are EXCLUDED
- personal results files are stored on the server for 6 months
- if you choose to be billed annually, you can save 40% of your monthly subscription
Designing Stairs Pricing
Includes | |
| Completed construction design (drawings, estimates, 3D-model) | ✔️ |
| Parts size based on the assortment in the building supply store | ✔️ |
| Specialist recommendations | ✔️ |
| BONUS. Several staircase variants | ✔️ |
| $91.43* *per staircase/floor Try | |
- you can leave a request for the design of the stairs using a special form (the request will be processed only after the payment)
- designing stairs is performed only with KALK.PRO tools (do not use any third-party services, programs and CAD-systems)
- payment includes one staircase in one stairwell; cost of designing multistory stairs is calculated by formula: $91.43 × number of floors
Widgets Pricing
Available widgets | |
| Roofs | |
| Shed roof (pent roof) | ✔️ |
| Gable roof | ✔️ |
| Hipped roof | ✔️ |
| Pyramidal roof | ✔️ |
| Stairs | |
| L-shaped staircase with landing | ✔️ |
| L-shaped staircase with winder steps | ✔️ |
| U-shaped staircase with landing | ✔️ |
| U-shaped staircase with winder steps | ✔️ |
| Straight staircase (closed stringers) | ✔️ |
| Straight staircase (open stringers) | ✔️ |
| Straight staircase (polyline) | ✔️ |
| Spiral staircase | ✔️ |
FREE* *subject to the availability of a backlink to KALK.PRO site | |
- read more about the functionality of widgets on the page
- widget lease term 100 years
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