Track sodium using workout and climate inputs. See loss estimates, replacement goals, and hydration guidance. Train longer with better electrolyte balance and recovery support.
| Session | Duration (h) | Sweat Rate (L/h) | Sweat Sodium (mg/L) | Adjusted Sodium Loss (mg) |
|---|---|---|---|---|
| Easy Ride | 1.0 | 0.7 | 700 | 490 |
| Long Run | 1.5 | 1.1 | 900 | 1485 |
| Hot Match | 2.0 | 1.4 | 1100 | 3080 |
| Gym Circuit | 0.8 | 0.9 | 850 | 612 |
Base sweat loss is calculated in one of two ways:
Manual method: Sweat Loss = Sweat Rate × Duration
Body-mass method: Sweat Loss = (Pre Weight − Post Weight) + Fluid Intake − Urine Loss
Climate-adjusted sweat rate: Adjusted Sweat Rate = Base Sweat Rate × Intensity Factor × Climate Factor
Climate factor: 1 + (Temperature − 20) × 0.01 + (Humidity − 50) × 0.002, with only positive heat and humidity adjustments applied.
Sodium loss: Sodium Loss = Adjusted Sweat Loss × Sweat Sodium Concentration
Replacement target: Replacement Sodium = Sodium Loss × Replacement %. Salt equivalent is estimated with sodium-to-salt conversion: NaCl ≈ Sodium × 2.54.
It is the amount of sodium lost in each liter of sweat. Values vary widely between athletes, so testing or repeated field observations improves accuracy.
Use manual mode if you already know your sweat rate. Use body-mass mode if you measured pre and post workout weight and tracked drinking.
No. It is a planning tool for training hydration. Athletes with medical conditions, cramping history, kidney concerns, or extreme losses should consult a clinician.
Hotter and more humid conditions can raise sweat output. The climate factor helps create a more realistic estimate than duration alone.
Not always. Many athletes aim to replace part of losses during exercise and finish recovery afterward. Tolerance, event length, and drink composition all matter.
Large body mass drops can signal meaningful dehydration. Many coaches watch closely when losses move past two percent, especially in heat.
Yes. It works for runs, rides, matches, classes, and field sessions. Estimate each athlete separately for the best hydration strategy.
Store each session result to compare conditions, sweat rates, and replacement outcomes over time. Trends help refine your personal hydration plan.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.