KALK.PRO Plans & Pricing

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


No plan


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

*billed monthly

*billed annually

*billed annually



  • 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



Widgets Pricing

Available widgets

Shed roof (pent roof)✔️
Gable roof✔️
Hipped roof✔️
Pyramidal roof✔️
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✔️
*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





Refund Conditions

  • refund apply, if KALK.PRO website failed to provide a service for technical or any other reasons
  • refund will be denied, if the services is fully provided to the user
  • refund will be denied, if the services not meeting user's expectations
  • refund will be denied, if the user has lost interest in the services


Refund Procedure

  • create a refund request using e-mail support@kalk.pro or website live chat
  • wait to request processing within 1-7 business days after purchase
  • provide bank account details or card number to refund transfer


Please attention, bank's 10% transfer fee is charged for refunds





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