Enter two eGFR values and the years between them. The slope shows how quickly kidney function is changing per year.
Annual change
— mL/min/yr
📊
Your visual report appears here
Fill in the form and press Calculate. You will get your number, an interpretation chip, and a personalized chart pack drawn instantly in your browser.
- Risk spectrum with your position marked
- Reference ranges from the original publication
- Shareable link, nothing stored
Scientific references
What slope means
Healthy aging loses roughly one mL/min per year after midlife. A sustained loss of five or more per year defines rapid progression and predicts kidney failure risk far better than any single reading.
Getting a fair slope
Use at least three readings spread over a year or more. Single low values during illness or dehydration exaggerate decline and should be excluded.
Understanding your result
- Steeper than minus five per year is rapid progression
- Minus one to minus five is faster than expected aging
- Around minus one or better matches normal aging
Slowing the slope
Blood pressure control, SGLT2 inhibitors for eligible patients, avoiding NSAIDs and treating diabetes all flatten the decline.