Here is a tool that makes measuring things so easy. The GLM 100 C Laser Measure is a Bluetooth enabled device that allows you to use your smartphone or tablet to remotely take measurements and instantly have them transferred to your device. It has a built-in tilt sensor and a backlit display. It has ten measurement modes: length, area, volume, angle, min/max, continuous, single indirect height, single indirect length, combined indirect height, and multi-surface.
The device has iPhone and Android apps you can use to track measurements. It even facilitates collaboration in team-oriented environments. Not cheap but handy for professionals.