matter/antimatter = 89876 TJ/Kg
hh fusion (full cycle, including neutron emmisions) = 645 TJ/Kg  (81 TJ/Kg of water, 22500 units electricity equivelent)
DT fusion (including neutron emmisions) = 337 TJ/Kg
fission (bomb) = 88 Tj/Kg
fission (theoretical 100% fuel consumption [Breeder reactor], or commersial + multiple fuel reprocessing loops) = 85 Tj/kg
fission (best theroretical [Deep Burn Modular Helium Reactor]) = 40 Tj/kg
fission (present commersial reactor design) = 10 Tj/kg
fission (present commersial reactor) = 5 Tj/kg
geostationary (& ~lunar) = 60 mj/kg
low earth orbit (specific energy) = 33 mj/kg
Hydron gas burn (including air mass) = 29 mj/Kg
high explosive (proposed) = 25 mj/kg
Petrol (including air mass) = 11 mj/Kg
high explosive = 10 MJ/Kg
tnt = 5 Mj/kg
Hydrogen peroxide (as monopropellant) = 3 mj/kg
battery (best prototype) = 3 mj/kg
battery (mass production e.g. li+) = 1 mj/kg

Hydron gas burn (ignoreing air mass) = 143 mj/Kg
Petrol (ignoreing air mass) = 46 mj/Kg

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hh fusion at 100% effientcy
Not possible in practice at less than stella mass due to the low chance decay needed in reaction chain.
Also major issue of trying to harvest silgificant percentage of energy as neutron radiation.

e = (m*v*v) / 2

81 Tj = ( 8/10 * v * v)/2
162 = 8/10 * v*v
202.5 = v*v
v = 14.23 T m/s
v = 14 230 000 000 m/s

c = 299 792 458 m/s
~
proper velocity = 14 230 000 000 m/s
actual velocity = 296 649 880.94530570 m/s (~0.99% light speed)

momentum = m * properVelocity
momentum = 1 * 14230000000
momentum = 14230000000 J = ~14Gj

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mementum = m * velocity * sqrt(1 - ( (velocity^2) / (c^2) ) )

Should be able to solve for the apparent mass
14230000000 = m * 296649880.94530570 * sqrt ( 1- (296649880.94530570^2 / 299792458^2 ) )
14230000000 = m * 296649880.95 * sqrt ( 1- (296649880.95 / 299792458^2 ) )

mass equivelent of 1kg of propelent = ~48 kg  

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v[rocket] = v[exhaust] * ln ( (m[propelent] + m[rocket]) / m[rocket])

10 ton rocket
v = 296649880.94530570 * ln( (48 + 10000) / 10000 )
v = 1420513 m/s = ~0.5% light speed
~100kg fuel to 50% light speed

1 KTon rocket

v = 14249 m/s
~11T fuel to 50% light speed

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Try without the lorenz foctored mass/speed (seem to be approx equivelent (up to 99% light speed anyway)

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10 ton rocket - hh fusion 1kg of water - Using fusion output and oxgen remainder as propelent.
v = 14 230 000 000 * ln( (1+10000) / 10000 )
v = 1422929 m/s