eGFR Calculator (Simplified CKD-EPI)
Estimate glomerular filtration rate using a simplified CKD-EPI style formula from serum creatinine, age, and sex.
Formula and method
This calculator computes Estimated eGFR directly in your browser without sending data to an external server.
Mathematical formula
- Estimated eGFR:
(sex===1 ? 141 : 144) × Math.min(creatinine ÷ (sex===1?0.9:0.7)^(1), sex===1?-0.411:-0.329) × Math.max(creatinine ÷ (sex===1?0.9:0.7)^(1), -1.209) × 0.993^(age)
Variables and parameters
- Serum creatinine (creatinine): default value 1 mg/dL.
- Age (age): default value 45 years.
- Sex (1=male, 0=female) (sex): default value 1.
Some formulas are undefined for certain input combinations (such as division by zero or logarithms of non-positive numbers). In those cases the live tool displays an alert instead of NaN.
Embed this tool
Paste this snippet into your own site or blog post to embed a live, working copy of this tool. It links back to the full page on SpecWhale.
Frequently asked questions
What equation and variables does eGFR Calculator (Simplified CKD-EPI) use?
eGFR Calculator (Simplified CKD-EPI) evaluates outputs such as <strong>Estimated eGFR</strong> based on inputs including Serum creatinine, Age, Sex (1=male, 0=female). Check the Mathematical Method section for the explicit formula.
What should I keep in mind when interpreting eGFR Calculator (Simplified CKD-EPI) metrics?
Health and body calculators provide general estimates derived from standard population equations. Individual physiological differences (such as muscle mass or hydration) can alter personal results.
What happens if I enter invalid or zero values into eGFR Calculator (Simplified CKD-EPI)?
If an input combination is mathematically undefined (such as division by zero or negative square roots), SpecWhale alerts you gracefully rather than returning invalid NaN outputs.
Are my calculations in eGFR Calculator (Simplified CKD-EPI) saved or private?
All calculations are 100% private and run locally in your Web browser. Your numbers are never uploaded to any server, but can be saved locally to your device or exported as CSV/JSON.
Is eGFR Calculator (Simplified CKD-EPI) free to use?
Yes. eGFR Calculator (Simplified CKD-EPI) is completely free, has no usage limit, and does not require an account, email, or API key.
Does eGFR Calculator (Simplified CKD-EPI) store or upload my data?
No. eGFR Calculator (Simplified CKD-EPI) calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is eGFR Calculator (Simplified CKD-EPI)?
eGFR Calculator (Simplified CKD-EPI) uses a standard formula (see the Method section above for the exact expression). For high-stakes financial, medical, or legal decisions, confirm the result with a professional or an authoritative source before relying on it.
Can I embed eGFR Calculator (Simplified CKD-EPI) on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of eGFR Calculator (Simplified CKD-EPI) to your own blog post or page.