Questions, feedback, bug reports, consultation requests, or just want to say hello — our team of concrete engineers and developers is here to help.
We typically respond within 1–2 business days. For faster help, check the FAQ or Reference Library first.
For technical questions, the FAQ answers the 50 most common questions. For calculation issues, click "Show Working" in the calculator output — this shows every step and helps identify the discrepancy.
Fill in the form below and we'll get back to you as soon as possible. Fields marked * are required.
The more specific your report, the faster we can identify and fix the problem. For calculation discrepancies between MixDesignCalc and your manual IS 10262:2019 calculation, please include the following in your message:
For non-calculation bugs (calculator not loading, PDF not downloading, form errors), a screenshot is the most helpful attachment. Use the Attachment field in the contact form to upload it directly.
Beyond the self-service calculator, MixDesignCalc offers professional consultation for complex projects that need expert engineering review. Our team of experienced concrete technologists and structural engineers can assist with:
Independent review of mix design calculations and trial mix results for IS 10262:2019 compliance. Suitable for government project submissions requiring third-party verification.
Specialist mix design for marine structures, M50+ high-performance concrete, UHPC, and other demanding applications where standard calculator defaults may not be sufficient.
Technical support for projects with failed cube results, non-compliant concrete investigations, or retrospective mix design assessment. Expert report preparation for dispute resolution.
On-site or online training on IS 10262:2019 mix design, concrete quality control, admixture selection, and MixDesignCalc for engineering teams, RMC plants, and academic institutions.
To enquire about consultation services, select "Partnership or licensing enquiry" or "Education / training / workshop" in the enquiry type dropdown above, or email partnerships@mixdesigncalc.com directly.
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| Enquiry Type | Typical Response Time | What to Expect |
|---|---|---|
| General calculator question | 1–2 business days | Direct answer or link to FAQ / Reference Library section covering your question |
| Bug report / calculation error | Within 5 working days | Acknowledgement within 24 hrs; investigation and response within 5 days; fix in next monthly release if confirmed |
| Technical mix design / IS 10262 query | 2–3 business days | Detailed technical answer from a qualified concrete engineer; complex cases may require additional information |
| Account / billing issue | 1 business day | Resolution or clear next steps provided; billing adjustments processed within 48 hours of confirmation |
| Feature request | 3–5 business days | Acknowledgement and addition to the feature vote board; popular requests get prioritised for upcoming releases |
| Partnership / licensing | 3–5 business days | Initial response with our partnership framework details; follow-up call to discuss specifics if there's a fit |
| Training & education enquiry | 3–5 business days | Discussion of requirements, audience, and format; custom proposal for organisation training programmes |
We respond during Indian Standard Time (IST, UTC+5:30) business hours: Monday to Friday, 9:00 AM – 6:00 PM IST. Messages received on weekends or public holidays are answered on the next business day. We observe all national public holidays per the Government of India calendar.