Send Us a Message
We typically respond within 24-48 hours
Frequently Asked Questions
Before reaching out, check if your question is answered below:
Are the calculators really free?
Yes! All our calculators are 100% free with unlimited uses. No registration, no credit card, no hidden fees. We believe sleep health tools should be accessible to everyone.
How accurate are the calculator results?
Our calculators use research-based formulas and sleep science to provide estimates accurate for most people. However, individual sleep needs vary based on age, health, lifestyle, and genetics. Results should be treated as starting points, not absolute rules. Always consult healthcare professionals for personalized medical advice.
Can I use calculator results to diagnose sleep disorders?
No. Our calculators are educational tools, not diagnostic instruments. If you suspect you have a sleep disorder (insomnia, sleep apnea, narcolepsy, etc.), please consult a sleep specialist or physician for proper evaluation and treatment.
Why do I still feel tired even when following the recommendations?
Many factors affect sleep quality beyond timing and duration: stress, diet, exercise, screen time, sleep environment, medications, and underlying health conditions. If persistent fatigue continues despite following sleep hygiene recommendations, consult a healthcare professional to rule out medical issues.
Can you add a specific calculator or feature?
We love hearing suggestions! Use the contact form above with subject "Feature Request" to share your ideas. While we can't implement every suggestion, we prioritize features that benefit the broadest user base and align with evidence-based sleep science.
How do I report a bug or technical issue?
Please use the contact form above with subject "Technical Issue" and include: which calculator/page, what you were trying to do, what happened, and your browser and device type. Screenshots are very helpful if possible.