The calculated distance (air line) between Stowbtsy and Svyetlahorsk is approximately 137 miles respectively 221 kilometers.
By car or train, the actual journey to Svyetlahorsk is certainly longer, as only the direct route (as the crow flies) between Stowbtsy and Svyetlahorsk has been calculated here.
Air line (approximately)
221 kilometers
119 nautical miles