How to Play Piano Scales with Both Hands
Master hands-together C major scale coordination by synchronizing finger crossings, maintaining relaxed curved hand posture, and locking in steady metronome timing.
This guide shows how to play piano scales with both hands in 25-35 minutes. Start with set bench height and camera sightline; follow the safety notes and step checkpoints below.
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- Read the tools, materials, safety notes, and steps below for free.
- Tap See 20-second demo if you want to understand it first.
- Tap Start Camera Coach when you want hands-free help, or Voice-only if you do not want to use the camera.
- Allow camera and microphone. Point your phone at the work; the coach watches your progress and tells you the next step.
🧰 Required Tools & Equipment
- ✓ 88-key acoustic piano or touch-sensitive digital keyboard
- ✓ Adjustable piano bench
- ✓ Digital metronome or metronome smartphone app
- ✓ Smartphone tripod or side mount
📦 Materials & Supplies
- ✓ Printed C major fingering reference chart
⚠️ Safety Checkpoints & Warnings
- • Adjust bench height so forearms rest parallel to the floor with relaxed, un-hunched shoulders.
- • Maintain floating, flexible wrists; never drop wrists below key level to avoid extensor tendonitis.
- • Stop immediately and shake out hands if you experience numbness, tingling, or sharp forearm pain.
📋 Step-by-Step Guide (7 Steps)
Set Bench Height and Camera Sightline
Position your phone camera 2 to 3 feet to your right side angled downward at 45 degrees so your forearms, wrists, and all keys are clearly visible. Sit on the front half of the bench with your spine erect, feet flat on the floor, and adjust the bench height so your forearms run horizontally to the white keys. Place both hands in a natural curved dome shape on Middle C (Right Hand Thumb/1) and C3 one octave below (Left Hand Pinky/5).
- • Forearms form a straight, horizontal line parallel to the key tops.
- • Fingers curve naturally as if gently holding a tennis ball, resting on key pads.
- • Sitting too low causing wrists to bend sharply upward against the keybed lip.
- • Slouching shoulders forward and locking the elbow joints against the ribs.
Map Asymmetrical Crossing Fingerings
Say aloud and mark the finger crossing points before pressing keys together: Right Hand (RH) crosses thumb (1) under middle finger (3) between E and F, while Left Hand (LH) crosses middle finger (3) over thumb (1) between G and A. Play the single octave ascending scale with your right hand alone twice (1-2-3-1-2-3-4-5), then your left hand alone twice (5-4-3-2-1-3-2-1). Verify that fingerings are fully committed to muscle memory before attempting hands-together movement.
- • RH thumb smoothly tucks underneath finger 3 without raising the wrist higher than 1 inch.
- • LH finger 3 crosses cleanly over finger 1 without collapsing the finger knuckle.
- • Using finger 4 instead of finger 3 during the first cross in either hand.
- • Twisting the entire elbow outward during the thumb tuck rather than pivoting at the wrist.
Drill the First Hand Pivot Intersection
Place LH on C3 (finger 5) and RH on C4 (finger 1). Play C-D-E simultaneously (LH: 5-4-3, RH: 1-2-3). On the fourth note, execute the RH thumb tuck to F while LH plays finger 2 on F, then immediately freeze hands in place to verify finger 1 (RH) and finger 2 (LH) are sounding F in unison.
- • Both hands strike F simultaneously with RH thumb and LH index finger.
- • Wrist remains stable with no jerky upward bouncing motion on the transition.
- • Right hand rushing the thumb tuck before Left Hand reaches finger 2.
- • Collapsing the RH index finger knuckle when the thumb ducks underneath.
Drill the Second Hand Pivot Intersection
From F, play G together (RH: 2, LH: 1). On the next note A, execute the Left Hand cross-over (LH finger 3 crosses over LH thumb to A) while RH plays finger 3 on A. Freeze on A to confirm LH finger 3 and RH finger 3 are striking simultaneously in unison.
- • Both hands strike note A simultaneously using their respective finger 3s.
- • LH thumb glides smoothly into palm clearing space for finger 3.
- • LH playing finger 4 instead of finger 3 across the thumb.
- • Dropping the left wrist below the key surface during the crossover.
Perform the Complete Ascending Octave
Set your metronome to 50 BPM, with one note per beat (quarter notes). Play the full ascending C major scale from C to top C hands together: C (RH 1/LH 5), D (2/4), E (3/3), F (1/2), G (2/1), A (3/3), B (4/2), and finish on top C (RH 5/LH 1). Hold the final C for two beats while keeping wrist relaxed.
- • Every pair of notes strikes exactly together with zero flaming or split-timing.
- • Scale concludes with RH finger 5 and LH finger 1 resting on octave C.
- • Speeding up through the middle of the scale where crossovers happen.
- • One hand lifting entirely off the keys (staccato) while the other plays legato.
Execute the Descending Crossover Reversal
Start from top C (RH 5/LH 1) and descend note-by-note. Reverse the crossing sequence: at G to F, LH tucks thumb (1) under finger 3 while RH plays finger 2; at F to E, RH crosses finger 3 over thumb (1) to play E while LH plays finger 3. Continue downward smoothly until LH reaches finger 5 and RH reaches finger 1 on the starting C.
- • RH crosses finger 3 over thumb precisely when LH strikes finger 3 on E.
- • Both hands land simultaneously on the low C octave with curved finger posture.
- • RH missing the finger 3 crossover and running out of fingers before bottom C.
- • Hitching the right elbow outward when crossing finger 3 over thumb.
Lock In Continuous Up-and-Down Legato at 60 BPM
Set your metronome to 60 BPM. Play up from bottom C to top C without pausing on the top note, immediately reversing direction to descend back to the start. Focus on producing an even tone across all fingers, ensuring thumb strikes sound as soft and controlled as the longer fingers.
- • Continuous seamless transition at top C without an audible rhythmic pause.
- • Fingers remain close to key surfaces throughout the entire 15-note loop.
- • Accenting thumb notes excessively loud compared to fingers 2, 3, 4, and 5.
- • Letting fingers fly high above the keyboard when they are not actively striking.
Don’t have everything?
- No Hardware Metronome? Free smartphone metronome app or keyboard built-in metronome
- No Adjustable Piano Bench? Sturdy dining chair with firm cushions or folded towels to raise seat height