How accurate are these calculators?
We mirror the same formulas used by banks, insurers, and clinicians. Each function is unit tested and the results are rounded to two decimals for clarity.
Fast
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Accurate
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Free
Powerful online calculators at your fingertips
Calculator Hub focuses on clarity: every calculator shows the exact formulas, context, and next steps so you can move from question to confident decision in seconds.
Finance
Loan EMI
Monthly payment, total interest, and amortization schedule with CSV export.
Health
BMI
Body Mass Index calculator with metric & imperial units plus risk categories.
Coming soon
Date difference
Workdays vs. calendar days, ideal for project planning. Launching shortly.
Why choose Calculator Hub?
Transparent math, human-readable explanations, and performance-first PHP mean every page loads instantly without heavy JavaScript bundles. We cache expensive calculations and only run the logic you need.
- Real-world formulas validated against banking & health references.
- Accessible forms with keyboard shortcuts and descriptive labels.
- Downloadable data for deeper analysis.
Lightweight by Design
Calculator Hub is built with clean, minimal code, optimized assets, and zero unnecessary scripts—ensuring instant load times even on slow networks. Every page is kept intentionally small so it works smoothly on mobile data, older devices, and low-bandwidth connections. By avoiding bloated libraries and unnecessary animations, we focus resources on what matters most: fast, accurate calculations.
Frequently asked questions
Updated as we add new tools and features.
Can I export my data?
Yes. The EMI calculator ships with a one-click CSV export so you can share payoff timelines with clients or colleagues.
Will more tools be added?
Date difference, percentage change, and ROI calculators are on the roadmap. Send requests via email and we will prioritize them.