Flight Crew Air Transport Pilot (ATP)
Time Pressure; Distraction; Situational Awareness
Deviation - Speed All Types; Deviation / Discrepancy - Procedural Weight And Balance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Became Reoriented
Human Factors
While running predeparture flows; I entered the incorrect fuel on board number into the ACARS weight and balance program. The fueler had arrived late; and my guess is that I entered a fuel number off of the Multi-Function Display (MFD) while we were still being fueled. The number entered was 5;480 while the actual fuel on board at brake release was 7;100. I normally check to make sure our weight in the performance unit page matches our takeoff data message weight with the only difference being the taxi burn. We were also coordinating late arriving bags with the ramp and I may have been distracted. I also failed to notice that the takeoff data message warned us that fuel was below release by 640 pounds. The aircraft was properly fueled.  The incorrect fuel input caused our weight and balance and speeds to be incorrect. I estimated that our V2 speed was incorrect by at least 3 knots. I realized my error when the Pilot Monitoring went to pull up our landing data during the flight. The request page showed our expected fuel on arrival to be 1;600 pounds which was incorrect. He wondered why this was. I pulled up the takeoff data message and saw that our Fuel on Board (FOB) was off by over 1;500 pounds from what we had actually taken off with. The only explanation is that I entered the wrong fuel and failed to catch my error despite several opportunities to do so.The threat was that our takeoff speeds were incorrect. While we were still within weight limits for our departure runway; in a different situation; we could have been overweight for takeoff and not known it.Maintain vigilance for errors and cross check fuel numbers. Also; slow down when going through the takeoff data message and thoroughly read any warning messages before going to the speeds page. I am normally very good about doing this; but I am not sure why this situation was different. I had numerous opportunities to catch this error but failed to do so.
An EMB-145XR First Officer reported taking off with incorrect V speeds because of an inaccurate fuel data input.