The calculated distance (air line) between Thái Nguyên and Bắc Giang is approximately 31 miles respectively 51 kilometers.
By car or train, the actual journey to Bắc Giang is certainly longer, as only the direct route (as the crow flies) between Thái Nguyên and Bắc Giang has been calculated here.
Air line (approximately)
51 kilometers
27 nautical miles