Previous Page...   Printer Version Science Constants - Proton Mass Symbol: mp Value: 1.67262158(13) × 10-27 kg 1.00727646688(13) u 1.50327731(12) × 10-10 J Category: - Proton Particle Constants Description:   [ H O M E ] [ S C I E N C E ] [ M A T H S ] [ A S T R O N O M Y ] [ Download ] [ Shop ] [ Contact ] [ About ]