BuzzCut Lab

Buzz Cut Grow-Out Timeline Calculator — Plan Your Next Trim

Calculate exactly how many weeks it takes to grow from one guard size to another. See week-by-week growth stages, plan your maintenance schedule, and know when to trim. Based on average hair growth rates of 3mm per week.

Calculate Your Growth Timeline

Select your starting and target guard sizes

⏱️YOUR GROWTH TIMELINE
#2
6mm
→
#4
13mm
3 Weeks
Estimated growth time
💡
Pro tip: Tidy up edges every 1–2 weeks. Use lighter guards around the neckline to maintain a clean fade. Average hair grows 3mm per week.

Week-by-Week Growth Progress

Track your hair length progression and closest guard sizes

Week 1
≈#3
9mm
Length
Closest to #3 (10mm)
Week 2
≈#4
12mm
Length
Closest to #4 (13mm)
Week 3
≈#5
15mm
Length
Closest to #5 (16mm)

Popular Growth Scenarios

Quick reference for common buzz cut transitions

#1
→
#3
3 weeks
Short to medium transition
#2
→
#4
3 weeks
Most common growth path
#3
→
#5
2 weeks
Medium to longer style

Understanding Buzz Cut Growth Rates

Human hair typically grows at an average rate of 3mm per week, or approximately 1.25cm per month. This calculator uses this standard growth rate to estimate how long it will take to transition between different clipper guard sizes.

Planning your trim schedule: Most people maintain their buzz cut by trimming every 2-3 weeks. If you're growing out to a longer length, you can extend this to 3-4 weeks while still keeping edges tidy with a higher guard number.

Individual variations: Actual growth rates can vary based on age, genetics, nutrition, and season. Some people may experience slightly faster or slower growth. Use this calculator as a general guide and adjust based on your personal experience.

Ready to compare different guard sizes?

See visual comparisons and detailed information about each guard size