All vampires can crush granite boulders, so this scales to all 3 profiles (Edward, Jane and Benjamin)
Bella Swan
Bella's Height: 1,6256 meters
Weight : 49,8952 kg
Body Surface Area: 1.43 m2
Surface area of her hand is 0.83% of 1.43 m2
1.43 x 0.0083 = 0.011869 m^2
Crushing Strength of Granite: 104 - 140 MPa
Force = 104,000,000 x 0.011869 = 1,234,376 Newtons L.E (138,75 tons of force) (Class K)
140,000,000 x 0.011869 = 1,661,660 Newtons H.E (186,78 tons of force) (Class K)
I believe she did it with a single hand. In the book she says: (“I’ll get it,” I said, pinching the stone into sand.)
Two Hands : 138,75 x 2 = 277.5 tons of force (Class K)
186,78 x 2 = 373.56 tons of force (Class K)
Emmett crushes granite
Emmett Cullen (Is stronger than an average vampire)
Height: 1,9558 m
Weight: 88,4505 kg (I used the actor's weight)
Body Surface Area: 2.14 m2
Surface Area of his hand is 0.017762 m2
Using 104 MPa = 1,847,248 Newtons (207,64 tons of force) -> x2 = 415.28 tons of force (421,944.0 kgf) Class K
Using 140 MPa = 2,486,680 Newtons (279,51 tons of force) -> x2 = 559.02 tons of force (567,990.5 kgf) Class K
Class K: 10^5 to 10^6 kg -> 100,000 - 1,000,000 kg
But Bella is a Newborn at this time, making her at least twice as strong as a normal vampire, as it's said that a newborn could crush older vampires.
So 277.5 x 2 = 555 tons of force (563,906 kgf) still Class K
Bella punches through granite
373.56 x 2 = 747.12 tons of force (759,109 kgf) still Class K
Edward's Meadow Speed Feat
This was kinda talked about before, but as the new Midnight Sun came out it gave us the Meadow's Area
Edward circles the Meadow in half a second twice
“I was on my feet, racing like her heart, in two tight circles around the edge of the clearing, wondering if she could even see what I was showing her”.
"Area of the meadow, which was roughly 11,035 square feet"
Bella turns Granite into sand
Area of the meadow = 1025m²
A = Pi x r²
r² = A / pi
r² = 1025 / 3,14
r² = 326.4
r = V326.4
r= 18.06 m
d = 2*r = 36.12m
C= 2*Pi * r = 113.4m
113.4 * 2 = 226.8m
Circles the meadow twice in half a second: 453,6 m/s -> Mach 1.3 (Supersonic)
Area of the Meadow
We could assume he circles in just 1 sec, it gives us: 226.8 m/s -> Mach 0.6 - Subsonic+
Edward circles the meadow twice
Not "possibly Hypersonic+" as says in his profile