GTKM vs NTKM

 

GTKM vs NTKM

Railway Terminology

GTKM (Gross Tonne Kilometre) 🚆

Standard Definition: Total weight of a train (including locomotive, wagons/coaches and payload) moved over one kilometre

It is a measure of total transport effort of Indian Railways

👉 Simple Practical Example:

Total train weight = 1,000 tonnes and Distance = 100 km

GTKM = 1,000 × 100 = 1,00,000 tonne-km

👉 Meaning: Railways use fuel, track capacity, and manpower to move entire train weight, not just goods

NTKM (Net Tonne Kilometre) 📦

Definition: Weight of only the paying load (goods/passengers) carried over one kilometre. It is a measure of earning output

👉 Simple Practical Example:

Goods weight = 600 tonnes and Distance = 100 km

NTKM = 600 × 100 = 60,000 tonne-km

👉 Meaning: Revenue is generated only from payload, not from engine or empty wagons

Key Difference (Exam Ready) 🎯

GTKM → Total weight moved (Effort)

NTKM → Paying load moved (Earnings)

Better Real-Life Analogy 🛻

A delivery truck travels 100 km

Total truck weight (vehicle + goods) = GTKM

Only goods inside the truck = NTKM

👉 Fuel is consumed for full truck weight (GTKM)

👉 Income comes from goods delivered (NTKM)

One Line Memory Trick 🧠

GTKM = Gross = Full train 

NTKM = Net = Only earning load