📊 eGFR Stages (G1–G5)
Understand the eGFR scale, see a simple table for stages, learn what albumin categories mean, and use a quick (educational) eGFR calculator. Senior-friendly and mobile-safe.
1 What is eGFR? â–ľ
eGFR (estimated glomerular filtration rate) is a lab estimate of how well your kidneys filter blood. It’s calculated from blood creatinine plus age and sex; the most current equations do not use race. Trends over months matter more than a single number.
- Higher eGFR is better. Lower numbers mean less filtering.
- Albumin in urine (protein leak) adds risk information beyond eGFR alone.
- Hydration, illness, and some medicines can temporarily change eGFR.
2 eGFR Stages (G1–G5) Table ▾
Use this as a quick reference. Your clinician will tailor goals to your health conditions.
| Stage | eGFR (mL/min/1.73m²) | Plain words |
|---|---|---|
| G1 | ≥ 90 | Normal/high eGFR (CKD possible if urine protein present) |
| G2 | 60–89 | Mildly decreased (CKD if other signs like protein) |
| G3a | 45–59 | Mild–moderately decreased |
| G3b | 30–44 | Moderately to severely decreased |
| G4 | 15–29 | Severely decreased |
| G5 | < 15 | Kidney failure (plan with specialist) |
Always interpret together with albumin (A1–A3), blood pressure, diabetes control, and symptoms.
3 Albumin Categories (A1–A3) ▾
Urine albumin-to-creatinine ratio (ACR) checks if protein is leaking into urine. More protein typically means higher kidney and heart risk.
| Category | ACR (mg/g) | Plain words |
|---|---|---|
| A1 | < 30 | Normal to mildly increased |
| A2 | 30–300 | Moderately increased |
| A3 | > 300 | Severely increased |
Combining G (eGFR) and A (albumin) guides treatment intensity.
4 Quick eGFR Calculator (Educational) â–ľ
Educational only—not a diagnostic device. Results are estimates and may differ from your lab’s calculation. Always rely on your clinician’s interpretation.
This uses a simplified creatinine-based, race-free equation similar in spirit to common lab formulas for adult outpatients.
5 Reading trends & when to repeat labs â–ľ
Trends matter
- Compare several months, not one day.
- Illness, dehydration, and some medicines can temporarily lower eGFR.
- Share all over-the-counter drugs and supplements with your clinician.
6 Protecting kidneys & heart (daily steps) â–ľ
Blood pressure
- Accurate home checks, calm posture, same times daily when adjusting treatment.
- Share averages (morning/evening over several days).
Salt & meals
- Taste first; use herbs/lemon instead of extra salt.
- Limit processed meats, instant soups, sauces.
- Ask about potassium/phosphorus limits for your stage.
Movement & sleep
- Walk 5–10 minutes after meals; add gentle strength and balance.
- Consistent bedtime; cool, dark room; safe night light.
7 Medicines & what to avoid â–ľ
Often used (individualized)
- ACE inhibitor or ARB (especially with albumin leak)
- SGLT2 inhibitor (for many with diabetes; sometimes without)
- Diuretics (“water pills”) for salt/fluid control
- Statins to reduce heart risk
- Many NSAIDs pain pills (over-the-counter) can worsen kidney function and raise BP
- Herbal products with unknown kidney effects
- Contrast dye scans without kidney-safe planning
Never start/stop medicines on your own—doses depend on eGFR, potassium, and other conditions.
8 FAQs â–ľ
What eGFR is considered “kidney failure”?
eGFR < 15 (G5) is considered kidney failure. Planning with a kidney specialist usually starts earlier (G4) so decisions are calm and personalized.
Can dehydration lower eGFR temporarily?
Yes. Illness and dehydration can temporarily lower eGFR. Your clinician may repeat labs when you’re well and hydrated.
Does muscle mass affect creatinine?
Yes. Low muscle mass can make creatinine lower and eGFR seem higher than true filtration. Clinicians interpret results in context.