Contact MixDesignCalc
Questions, feedback, bug reports, consultation requests, or just want to say hello — our team of concrete engineers and developers is here to help.
Get in Touch
We typically respond within 1–2 business days. For faster help, check the FAQ or Reference Library first.
✉️
Replies in 1–2 business days
🐛
Bug Reports
Investigated within 5 working days
🤝
Partnerships & Licensing
partnerships@mixdesigncalc.com
Response within 5 business days
What We Can Help With
Calculator questions
IS 10262 methodology
Mix design review
SCM proportioning
Bug reports
Feature requests
Compliance questions
Partnerships
Education & training
Quick Links
📖 FAQ Page
📊 Reference Library
🔄 Changelog
📋 Standards Guide
🧪 Trial Mix Guide
🎓 IS 10262 Tutorial
Before You Write to Us
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.
Send Us a Message
Fill in the form below and we’ll get back to you as soon as possible. Fields marked * are required.
Reporting a Calculation Issue or Bug – What to Include
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:
Ideal Bug Report Includes
- Concrete Grade & Exposure Class: e.g. M30, Severe exposure
- Cement Type & Grade: e.g. OPC 53
- Standard Deviation Used: e.g. 4.0 MPa
- Maximum Aggregate Size & Type: e.g. 20mm crushed granite
- Fine Aggregate Zone: e.g. Zone II
- Specific Gravity Values Entered: FA SG, CA SG, Cement SG
- Target Slump: e.g. 100mm
- Any SCMs or Admixtures: e.g. 25% fly ash, 1.0% PCE SP at 25% water reduction
- The Output You Received: Paste the actual values the calculator returned
- What You Expected: Your manual IS 10262 calculation result or the value you believe is correct, with working shown
- Browser & Device: e.g. Chrome 124 on Windows 11; Safari on iPhone 15
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.
Professional Concrete Mix Design Consultation Services
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:
📐 Mix Design Review
Independent review of mix design calculations and trial mix results for IS 10262:2019 compliance. Suitable for government project submissions requiring third-party verification.
🌊 Marine & HPC Design
Specialist mix design for marine structures, M50+ high-performance concrete, UHPC, and other demanding applications where standard calculator defaults may not be sufficient.
🔬 Failure Investigation
Technical support for projects with failed cube results, non-compliant concrete investigations, or retrospective mix design assessment. Expert report preparation for dispute resolution.
🎓 Training & Workshops
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.
Response Times & What to Expect After You Contact Us
← Scroll horizontally to view all columns →
| 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 |
Our Working Hours
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.