How do I tell the suspension spring rate from the marking?

The letter is stamped on the left fork leg (at the bottom, on the axle foot) and on the shock spring carrier. Weight is with riding gear.

EX

• fork: H 4.4 · J 4.6 · K 4.8 N/mm
• shock: H 46 · J 48 · K 50 N/mm
• H — 65–75 kg, J — 75–90 kg, K — 90–100 kg

MX

• fork: E 4.6 · F 4.8 · G 5.0 N/mm
• shock: B 54 · C 56 · D 58 N/mm
• E/B — 65–75 kg (soft), F/C — 75–85 kg (medium), G/D — 85–100 kg (hard)