Optimal Creatine Dosage Calculator for Athletes & Muscle Performance
A calculator that determines optimal creatine dosage based on body weight, activity level, and supplementation phase, helping athletes optimize their loading and maintenance protocols for muscle performance.
Creatinine Calculator
Calculate your estimated Glomerular Filtration Rate (eGFR) and assess kidney function based on creatinine levels.
Kidney Function Results
Estimated GFR
Kidney Function Status
Converted Creatinine Values
Understanding Creatinine
- Creatinine is a waste product from muscle metabolism
- Healthy kidneys filter creatinine from blood into urine
- Higher blood creatinine may indicate kidney problems
- Regular testing helps monitor kidney function
About GFR
- GFR measures how well your kidneys filter blood
- Normal GFR varies by age, gender, and body size
- GFR typically decreases with age
- Low GFR may indicate kidney disease
Frequently Asked Questions
Creatinine is a waste product that comes from normal muscle metabolism and from eating meat. Healthy kidneys filter creatinine from your blood into urine. If your kidneys aren't functioning properly, creatinine levels in your blood will rise. This makes creatinine an important indicator of kidney function.
Glomerular Filtration Rate (GFR) is the best measure of kidney function. It estimates how much blood your kidneys filter each minute. A lower GFR number means less kidney function. Normal GFR varies by age, generally decreasing as you get older. A GFR below 60 for three months or more may indicate kidney disease.
Several factors can affect creatinine levels: muscle mass (more muscle = higher creatinine), diet (especially meat consumption), exercise, certain medications, dehydration, and kidney function. This is why your healthcare provider considers multiple factors when interpreting your results.
The frequency of creatinine testing depends on your individual health situation. Generally: healthy adults during routine check-ups, people with diabetes or high blood pressure every 6-12 months, those with known kidney issues may need more frequent monitoring. Always follow your healthcare provider's recommendations.
To maintain kidney health: stay well hydrated, maintain a healthy blood pressure, control blood sugar if diabetic, eat a balanced diet low in salt, exercise regularly, maintain a healthy weight, avoid smoking, limit alcohol intake, and avoid excessive use of NSAIDs (like ibuprofen).
Early kidney disease often has no symptoms. Later signs may include: fatigue, swelling in feet/ankles, changes in urination, foamy urine, persistent puffiness around eyes, muscle cramping, trouble sleeping, poor appetite, or dry/itchy skin. If you experience these symptoms, consult your healthcare provider.
The eGFR calculation provides an estimate of kidney function based on your creatinine level, age, gender, and race. While it's a useful screening tool, it has limitations: it may be less accurate for very muscular people, elderly, or those with unusual dietary habits. Your healthcare provider will consider other factors for a complete assessment.
If your results indicate decreased kidney function: don't panic - confirm results with repeat testing, schedule an appointment with your healthcare provider, bring a list of all medications you take, prepare questions about your results, and discuss lifestyle changes that might help. Only make changes to your medications or diet under medical supervision.