Immersion Time Calculator
Calculate how many hours of comprehensible input you need to reach your target proficiency level. Set weekly goals for reading, listening, and viewing based on research-backed estimates.
Your Immersion Plan
Research-Backed Input Estimates
Research by linguist Paul Nation and others suggests that reaching advanced levels requires extensive input. Estimates vary by language difficulty and learner background, but general guidelines include:
- A1 to A2: 100-150 hours of comprehensible input
- A2 to B1: 200-300 hours of comprehensible input
- B1 to B2: 400-600 hours of comprehensible input
- B2 to C1: 800-1200 hours of comprehensible input
- C1 to C2: 1500+ hours of comprehensible input
The 95% Rule
For optimal vocabulary acquisition, content should be at a level where you understand 95-98% of words. At this level, you can infer unknown words from context while maintaining comprehension and engagement.