Caliper: Vernier Trainer

Learn how to read a metric 0.02 mm vernier caliper, one step at a time. Practice on an interactive instrument, understand how the scales line up, and build confidence before using a real caliper. UNDERSTAND THE READING Find the vernier zero, read the whole millimetres, identify the matching line and calculate the final measurement. Follow the guided introduction, then apply the method yourself. BUILD YOUR SKILLS Progress through 30 short levels covering reading, precision, setting measurements and timed challenges. PRACTICE THREE WAYS • Read: identify the measurement shown on the scale. • Set: move the jaw to a target measurement, with fine adjustments in 0.02 mm steps. • Speed: work through 10 timed challenges and review your accuracy, response time and best streak. SEE THE DETAILS Zoom in and move around the scale to inspect its markings. Use Fit Whole Scale to return to the complete view. START FREE The guided introduction and first five levels are free. A single in-app purchase unlocks levels 6–30 and unlimited Read, Set and Speed practice. No subscription or account required. Designed for students, apprentices and anyone learning to use a metric vernier caliper. This is a training simulator; it does not measure physical objects with your phone.