Wind speed is measured in a wide varienty of ways, ranging from simple to most sophisticated electronic systems. this wind speed indicator is intended for use in a variety of activities, such as track events, sailing, han-gliding, model aircraft flying, and measuring the speed of airflow in wind tunnels or in other gas-flow application. in this wind speed indicator, two ultrasonic transducers and PIC microcontroller are used. knowing the basic speed of sound under specified conditions, the rate at which the air mass moving can be calculated from the measured timing. the read out is shown on an alphanumeric liquid crystal display (LCD), with reading in meter per second, feet per second, kilometer per hour, and mile per hour . in this constructed anemometer, only the current wind speed can be measured and the average wind speed taken over 16 transmission cycles can also be obtained. there are two ways of calibrations. firstly, by comparing the wind speed of constructed anemometer with the car's speedmeter, it is accurate up to 50 kilometer per hour, and then began to fall of rapidly. secondly, the speed of constructed anemometer is compared with reference anemometer. by comparing the resulting data, the magnitude of winds speeds are nearly the same. the resolution of constructed anemometer is to nearest tenth of a meter per second and the measuring range of wind speed is from zero up to 50 miles per hour and possibly.