Conversation KPPS into RPM

on the torque vs speed curves, the X axis is marked with kpps (kilo pulse per second) or pps (pulse per second).
The following example explains the conversion into revolution per second and revolution per minute (RPM).

Number of Steps per Revolution:
(2-Phase Step Motor with Step Angle = 1.8°)
Full Step 1.8° → 360° / 1.8° = 200 Steps per Revolution
Half Step 0.9° → 360 / 0.9°   = 400 Steps per Revolution

Speed at 1 kpps (1000 pps):
Full Step 1.8° → 1000 pps / 200 Steps = 5 Rev. per Second x 60 = 300 RPM
Half Step 0.9° → 1000 pps / 400 Steps = 2.5 Rev. per Second x 60 = 150 RPM

Determination of the Torque:
the torque vs speed curves shows that the Step Motor reach ...
3 Nm Torque at 1 kpps = 300 RPM in Full Step Mode (blue Line) and  
3,3 Nm Torque at 1 kpps = 150 RPM in Half Step Mode (green Line)